Close
Close

Login here to access/preview our exam papers, or sign up now for your free membership!



2010
Sat
13
Nov

GCE ‘A’ Level 2010 Oct/Nov H2 Maths 9740 Paper 2 Suggested Answers & Solutions

(150)
Tuition given in the topic of H1/H2 (A Level) Maths Tutor from the desk of The Higher Council at 4:30 am (Singapore time)

Sorry to have kept everyone waiting, especially those who have been camping at the H2 Maths Paper 1 blog post.

Before that blog post’s comments section turns into a mini chit-chat lounge, here are the H2 Maths Paper 2 solutions that I’ve managed to get them done up despite my busy day (yesterday), with a little help from my siblings once again.

2010 A-Level October/November H2 Mathematics 9740 Paper 2 Suggested Solutions

2010 ‘A’ Level October/November H2 Mathematics 9740 Paper 2 Suggested Solutions
– click to download (Latest Version: 1.3)

Like students under exam pressure, I’ve done this under a bit of ‘pressure’ as well from the baying horde of “When will paper 2 be out?!”, “answers please!!!” etc. So, as with Paper 1, please leave a comment whenever you spot any mistake, typo and/or better/quicker/smarter methods (I really appreciate these! :)) and I’ll update the solutions as and when required.

Meanwhile, good luck for your remaining papers, and good morning to you if you’re seeing this the first thing on a bright Saturday morning!

As for me, it’s time for bed …

頑張って!!!

Revision Exercise

To show that you have understood what Miss Loi just taught you from the centre, you must:

  1. Leave A Comment!
Comments & Reactions

150 Comments

  1. anonymous's Avatar
    anonymous commented in tuition class


    2010
    Nov
    13
    Sat
    5:09am
     
    1

    thanks for being efficient. could you estimate a threshold for getting an A for us?(:

  2. ...'s Avatar
    ... commented in tuition class


    2010
    Nov
    13
    Sat
    5:27am
     
    2

    just wondering if i calculate s^2 wrongly.. my p-value will be diff.. do we get heavily penalised??? as for e prob question got my 1st part wrong thus my subsequent parts.. do we get ecf on dat??

  3. annonymous's Avatar
    annonymous commented in tuition class


    2010
    Nov
    13
    Sat
    7:14am
     
    3

    Q10i) says draw. do u use the graph paper?
    Q10ii) says correct to 4d.p, i think u made a mistake.

  4. :D's Avatar
    :D commented in tuition class


    2010
    Nov
    13
    Sat
    7:20am
     
    4

    q10ii) is wrong. the answer wants 4 dp (:

  5. Clement's Avatar
    Clement commented in tuition class


    2010
    Nov
    13
    Sat
    7:32am
     
    5

    Thanks for the answers! Btw the answers for 10 (ii)(a) and (b) should be in 4 d.p not 3 s.f.

  6. anon's Avatar
    anon commented in tuition class


    2010
    Nov
    13
    Sat
    7:32am
     
    6

    hi! thanks for the answers 🙂 but for question 10 (ii) the question asks for the answers to be corrected to 4 decimal places, but your answers are in 3 dp. yup just letting you know! 🙂

  7. Shermz's Avatar
    Shermz commented in tuition class


    2010
    Nov
    13
    Sat
    7:47am
  8. K's Avatar
    K commented in tuition class


    2010
    Nov
    13
    Sat
    7:53am
     
    8

    ya.. what will be the minimum to get A? i think i only have 72% of it, will i fall short for an A, badly?

  9. orangejuice's Avatar
    orangejuice commented in tuition class


    2010
    Nov
    13
    Sat
    8:11am
     
    9

    HEY! thank you SO MUCH for your efficiency!
    feel so relieved after seeing the solutions!
    anyway, for question 10, just want to point out a minor mistake in your solutions.
    10(ii) they want us to leave the answer correct to 4 dp instead of 3.
    I just realise it too 🙁

  10. DD's Avatar
    DD commented in tuition class


    2010
    Nov
    13
    Sat
    8:15am
     
    10

    thank you so much for uploading the solutions so fast! for the inequality question of 7v), shouldn't the lowest probability be 0 because there is a chance B and C are mutually exclusive?

  11. natalie's Avatar
    natalie commented in tuition class


    2010
    Nov
    13
    Sat
    8:17am
  12. Otto's Avatar
    Otto commented in tuition class


    2010
    Nov
    13
    Sat
    8:22am
     
    12

    My answer to 5(i) was:

    It is difficult to obtain the exact number of spectators belonging to each stratum.

    Izzit okay? Thanks. 🙂

  13. Anon's Avatar
    Anon commented in tuition class


    2010
    Nov
    13
    Sat
    8:40am
     
    13

    Thank you! 😀

    I have 3 questions.

    For 1ii), once we obtain the value of a and b, can we solve it using GC? Question did not specify that we couldn't >.<

    For 4iii(, is it necessary to prove that fg(x) exists before going on to prove the ans?

    For 11v), since the lowest possible number of busy days is 0 and will not be negative, should it be normalcdf(0,9.5 etc) instead of normalcdf(-e99 etc)? You get a slightly different answer: is that wrong?

    Oh, for 10ii), it's to 4dp not 3sf. Thank you very much! (:



    • 2010
      Nov
      15
      Mon
      8:28pm
       
      13.1

      @Anon: For Q1(ii), using your G.C. to obtain your final roots should by and large be fine. However, for a 5-mark question, I would recommend at least indicating in your workings that the conjugate of −2 + i (i.e. −2 − i) is also a root.

      Regarding Q4(iii), I believe that for this 2-mark question, you should be fine as long as you've demonstrated clearly in your workings how you've successfully derived fg(x). So don't worry about the additional proving of the existence of fg(x) (which is left there for our own checking only :P)

      As for Q11(v), this has been amended since version 1.2 of the solutions.

  14. e's Avatar
    e commented in tuition class


    2010
    Nov
    13
    Sat
    8:45am
     
    14

    just a small quibble but for the product moment correlation coefficient question, the paper asks for 4 d.p. instead of 3 s.f. heh 🙂 i almost made that mistake too...

  15. Daniel's Avatar
    Daniel commented in tuition class


    2010
    Nov
    13
    Sat
    9:04am
     
    15

    Hi, my answer is almost the same as yours.
    +) question 3i) I proved that dy/dx always greater than 0 and thus it has only 1 turning point, that is the minimum.
    I wonder if the examiner will penalize me for this unnecessary working. Eventually i also get x= -4/3 like u.
    +) Question 8ii) My answer is 0.067 🙁 My working is (2x2x1x2!) 5!
    +) Question 10 iv) : Can i just say we cannot use both regression lines b/c we cannot use value of drag force to estimate the value of wind speeds.
    The rest should be okay!!!
    Thanks for ur solution !!!

  16. greenapple's Avatar
    greenapple commented in tuition class


    2010
    Nov
    13
    Sat
    9:09am
     
    16

    hey! all's good! except that for qns 10 (ii), it's to 4 d.p., cnt correct it to 3 s.f. ~ anw, thanks for the neat and comprehensive solutions!

    but there's sth troubling me really badly. i hope u can enlighten me though.

    if for instance, i made an error in part (i) of a qns, and that caused me to have an incorrect ans for (i), which unfortunately is required in the subsequent parts. and of course, my other ans became terribly wrong as well.

    i'd like to clarify, will i be awarded method marks? and if yes, is it going to be a pathetic mark, or are they like just going to minus 1 mark for my wrong ans, assuming that my method is sound?

  17. J's Avatar
    J commented in tuition class


    2010
    Nov
    13
    Sat
    9:15am
     
    17

    Sir!! For the hypo testing qn do we use Z-test or T-test since it is normally distributed?:)

    PS thanks for working out the answers!

  18. xy's Avatar
    xy commented in tuition class


    2010
    Nov
    13
    Sat
    9:18am
     
    18

    if i calculated 11(iii) wrongly, does it means that for (iv) and (v) no matter whether my approach is correct i will still be wrong? or i will be marked down?

  19. James's Avatar
    James commented in tuition class


    2010
    Nov
    13
    Sat
    9:20am
     
    19

    Hey for question 10 (ii), the answers should be to 4 dp as required. No need to round off to 3 sf 🙂

  20. James's Avatar
    James commented in tuition class


    2010
    Nov
    13
    Sat
    9:24am
     
    20

    Hi, for qn 4 (iii), I don't think it is necessary to show that Rg is a subset of Df. Isn't it just substitution and simplifying the fraction to get the two marks?

  21. Anonymous's Avatar
    Anonymous commented in tuition class


    2010
    Nov
    13
    Sat
    9:37am
     
    21

    Hi thanks for uploading the answers so efficiently! =) But I'm not sure if for question 10 (ii) the answers should be 0.9860 and 0.9907 instead because the question asked for answers to be corrected to 4 decimal places.

  22. Anon's Avatar
    Anon commented in tuition class


    2010
    Nov
    13
    Sat
    9:43am
     
    22

    for the regression qn, it's 4dp, u read wrongly! the product moment part

  23. RJ's Avatar
    RJ commented in tuition class


    2010
    Nov
    13
    Sat
    9:51am
  24. meyeyumi's Avatar
    meyeyumi commented in tuition class


    2010
    Nov
    13
    Sat
    10:00am
     
    24

    hmmmmm, i tink i spotted some error
    10ii question say correct to 4dp not 3sf
    and if i am not wrong the C.C. are wrong, should be the other way round.
    thx a lot for this

  25. meyeyumi's Avatar
    meyeyumi commented in tuition class


    2010
    Nov
    13
    Sat
    10:10am
     
    25

    sry my bad the C.C. are correct, i m wrong OMG!

  26. verlyncheng's Avatar
    verlyncheng commented in tuition class


    2010
    Nov
    13
    Sat
    10:11am
     
    26

    thanks mr loi(:
    you may want to check q10(ii) answers. it's to 4dp, stipulated by qn.

    anyway, i think if your answers are right, i'm getting my perfect score for the paper (:

    thank you for making my day!
    cheers!

  27. Otto's Avatar
    Otto commented in tuition class


    2010
    Nov
    13
    Sat
    10:20am
     
    27

    Erm, the r values for Q10ii are to be given in 4 d.p., not 3 s.f.

  28. Kate's Avatar
    Kate commented in tuition class


    2010
    Nov
    13
    Sat
    10:21am
     
    28

    Hi for qn 9 part i is it necessary to square thr variance (the 2 in front) because I thought it's just y-(x+x) so should be var(y-2x) = var(y) + var(x) + var(x)?
    Or am I wrong?
    I thought only price need to square for this qn...

  29. brian's Avatar
    brian  commented in tuition class


    2010
    Nov
    13
    Sat
    10:24am
     
    29

    ppl relax. Math a level maximum A grade floor in the past few years is 73. It's not a perfect bell curve.

    Plus since it's an easy paper, they prolly will be more picky abt working and stuff to differentiate.

    From brian's blog: Taylor Swift – MineMy Profile

  30. Anonymous's Avatar
    Anonymous commented in tuition class


    2010
    Nov
    13
    Sat
    10:31am
     
    30

    Sigh, after reading so many comments regarding the bell curve, i decided i would contribute my 10 cents worth. First thing to note is that the A levels is not to test your relative performance amongst other Singapore students. It is supposed to be an indicator/measure of your knowledge as an 18 year old and your preparedness to be able to continue higher education. From cambridge's perspective, the papers they set should be in line with those requirements. As what my GP tutor says, it would be unfair to use the bell curve if indeed the quality of this year's students are better than that of last years (meaning if many of you score 80 plus, so what? The A will still hover around 70) unless they feel that the paper quality has changed which will not be much comparing last years and this years and hence they might increase the requirement to say 75 for an A?). The approximate quote given by the cambridge markers were " If we require you to swim 100 metres to get the A and you have shown us that you are capable, you will get it regardless of whether a big group of students have proven themselves to be able to swim around the world"

  31. anonymous's Avatar
    anonymous commented in tuition class


    2010
    Nov
    13
    Sat
    10:35am
     
    31

    I may be wrong, but for question 3(iii), isn't the graph of f^-1 supposed to be a reflection of the graph of f using the line y=x as a mirror?
    As for question 7(v), I would like to ask whether it is possible that there is a case where C notsubset B but there is a common area for A inter B inter C (3 separate circles like in case II but C also intersects B)?
    About question 11(iii) and 11(v), is the continuity correction supposed to be P(T>2199.5)cc and P(X<10.5) respectively?
    Thanks for uploading!

  32. anonymous's Avatar
    anonymous commented in tuition class


    2010
    Nov
    13
    Sat
    10:39am
     
    32

    Thanks for the answers(:. But do you mind explaining why for 7(v) the lower limit is 0.03? I got 0.07 though.

    My working was
    From part ii, P(A{union}B) = 0.92 and part iv, P(A{prime}{inter}C) = 0.15.
    {P(A{union}B) + P(A{prime} {inter} C) - P(A{prime} {inter} B {inter} C) <= 1} as {P(A {union} B {union} C)<=1}

    Sorry, can't type in the last part. Having troubles with the texts but subbing in the values and I get 0.07 as the lower limit.

  33. brian's Avatar
    brian  commented in tuition class


    2010
    Nov
    13
    Sat
    10:42am
     
    33

    For 11 (v), it should be from -0.5 to 9.5 cos it cannot be negative. qn 3 also need to label y-intercept and max-min coordinates.

    From brian's blog: Exam MattersMy Profile

  34. yk's Avatar
    yk commented in tuition class


    2010
    Nov
    13
    Sat
    10:48am
  35. sh's Avatar
    sh commented in tuition class


    2010
    Nov
    13
    Sat
    11:00am
     
    35

    But our fears are not unfounded because there are many ppl speculating that the min marks to get an A is 90. It seems ridiculous, but considering the difficulty of he paper again, it does seem plausible. ( which i hope not cos i'll be kissing gdbye to by A)....

    Can i know if there's error carried forward in A levels maths? and to what extent is it given?

    Guess what I can do now is to look forward and think positive. Gdluck to those taking As too this year! 🙂



    • 2010
      Nov
      13
      Sat
      12:02pm
       
      35.1

      @sh: ECF is given only if everybody screws up the question. I reckon question 9 will have ecf if you took into account the lid volume into 300.

      That's just my thoughts tho.

      From brian's blog: Taylor Swift – MineMy Profile

    • amber's Avatar
      amber replied to sh’s comment


      2010
      Nov
      13
      Sat
      1:10pm
       
      35.2

      @sh: This is what Cambridge wrote on their examiner's comments:

      Marks are of the following three types:
      M: Method mark, awarded for a valid method applied to the problem. Method marks are not lost for numerical errors, algebraic slips or errors in units. However, it is not usually sufficient for a candidate just to indicate an intention of using some method or just to quote a formula; the formula or idea must be applied to the specific problem in hand, e.g. by substituting the relevant quantities into the formula. Correct application of a formula without the formula being quoted obviously earns the M mark and in some cases an M mark can be implied from a correct answer.

      ... which should mean that there's ecf for As.

    • Anonymous's Avatar
      Anonymous replied to sh’s comment


      2010
      Nov
      13
      Sat
      2:52pm
       
      35.3

      @sh: Like you pointed out those are merely speculations, honestly a 90 for an A looks highly unlikely and if so would certainly draw some amount of controversy

  36. David's Avatar
    David commented in tuition class


    2010
    Nov
    13
    Sat
    11:03am
     
    36

    Graph of 3(ii) (b) looks incorrect - Gradient should be positive initially, becomes negative, go back to zero and then increase once more.

  37. David's Avatar
    David commented in tuition class


    2010
    Nov
    13
    Sat
    11:08am
  38. :D's Avatar
    :D commented in tuition class


    2010
    Nov
    13
    Sat
    11:10am
     
    38

    Hi there,
    The answers for 10(ii) should be left as 4 decimal places, instead for 3SF.

    :]

  39. David's Avatar
    David commented in tuition class


    2010
    Nov
    13
    Sat
    11:14am
     
    39

    For 8(i) you can do it even faster by only considering the first number. Everything else looks fine.

  40. val's Avatar
    val commented in tuition class


    2010
    Nov
    13
    Sat
    11:19am
     
    40

    Good morning! And thanks a lot for the answer.. (: what a relief.

  41. Anon's Avatar
    Anon commented in tuition class


    2010
    Nov
    13
    Sat
    11:24am
     
    41

    Thanks for uploading! But for question 10 (ii), aren't the r values supposed to be correct to 4 decimal places?

  42. cynthia's Avatar
    cynthia commented in tuition class


    2010
    Nov
    13
    Sat
    11:29am
     
    42

    Hey thanks so much for yur hard work;
    Qn 10 partii its supposed to be in 4dp ;D

  43. daryl's Avatar
    daryl commented in tuition class


    2010
    Nov
    13
    Sat
    11:45am
     
    43

    thanks for the answers!

    just one small error i've found, the answers for q10(ii) should be to 4dp as specified by the question and not 3sf.

  44. zack's Avatar
    zack commented in tuition class


    2010
    Nov
    13
    Sat
    11:48am
     
    44

    Please upload the H1 math paper solutions ):

  45. Mr Loi's Avatar
    Mr Loi Friend Mr Loi on Facebook commented in tuition class


    2010
    Nov
    13
    Sat
    12:08pm
     
    45

    Good morning (or rather good afternoon everyone).

    I think a million voices crying out "MR LOI!!! Q10(II) FINAL ANSWER MUST BE IN 4 D.P. NOT 3 SIG. FIG.!!!" have actually penetrated my dreams as I slept last night.

    I've uploaded version 1.1 of the solutions simply to correct this, and so as to stem the tide of further comments on this issue. I'm having class now and will attend to the other comments later.

    Hope to have your understanding and sorry about the 3 sig. fig. error.

  46. banana's Avatar
    banana commented in tuition class


    2010
    Nov
    13
    Sat
    12:14pm
     
    46

    omgawd I got careless mistakes ahhhhhhhhh 🙁

  47. somebody's Avatar
    somebody commented in tuition class


    2010
    Nov
    13
    Sat
    12:23pm
     
    47

    hmmm if i used z test instead of t test will i be wrong?...cos i still got the same conclusion...i'll prolly get atleast some marks righttt

  48. Otto's Avatar
    Otto commented in tuition class


    2010
    Nov
    13
    Sat
    12:37pm
     
    48

    Hi Mr Loi, I don't think your answer to 5(i) is appropriate, because the question asks why it is difficult to use stratified sampling, not why it is difficult to get an unbiased/unrepresentative sample... So my interpretation is that the question asks for practical difficulty in carrying out the sampling?

    And, after all, isn't a stratified sample meant to capture opinions from different strata for a more representative view? So what's wrong with Europeans having a rather biased opinion? >< It's the same as a stratified sample of boys and girls about the new ballet dance class. Probably girls will like it better than boys, yet this does not mean stratified sampling fails.

  49. justfate's Avatar
    justfate commented in tuition class


    2010
    Nov
    13
    Sat
    1:06pm
     
    49

    For Question 4v, it is ok if I just write the answer (-infinity to +infinity)?
    However, I took the range from the GC straight, would I still get the full three marks?

  50. Audrey's Avatar
    Audrey commented in tuition class


    2010
    Nov
    13
    Sat
    1:11pm
     
    50

    Hello, im wondering the continuity correction for the last question last part should be P(x > 2199.5) instead of 2200.5.

  51. sl's Avatar
    sl commented in tuition class


    2010
    Nov
    13
    Sat
    1:25pm
     
    51

    what if i just insert the numbers into the gc for question 1a? do i still get the marks?

  52. sl's Avatar
    sl commented in tuition class


    2010
    Nov
    13
    Sat
    1:34pm
     
    52

    sorry... can i ask you for qn 6?... the hypo testing question?... is it wrong? as in... they're asking you to calculate the mean time.. but you sub-ed the numbers inside. shouldnt you do this... x~N(mean,(variance/n))... because the data they gave you is the total. not the mean?

  53. Yohanes's Avatar
    Yohanes commented in tuition class


    2010
    Nov
    13
    Sat
    1:45pm
     
    53

    Hello, for qn4(iv), is it alright if I put my answer as 2<x<4 , x≠3?

  54. Anonymous's Avatar
    Anonymous commented in tuition class


    2010
    Nov
    13
    Sat
    2:10pm
     
    54

    I was just wondering..

    With regards to the hypothesis-testing question, if I keyed in s² [I forgot to square-root to obtain value s], and hence got the incorrect p-value and conclusion, would any marks awarded at all?

  55. Kidz's Avatar
    Kidz commented in tuition class


    2010
    Nov
    13
    Sat
    2:29pm
     
    55

    Question 10(iii), the question clearly asked for reference to 10(i) AND 10(ii)

    So other than concluding it based on the r value alone, you need to state the observation that the scatter plot reveals a non-linear relation.
    because there is a concave outwards, thus a quadratic equation should be a more suitable model.

  56. Anonymous's Avatar
    Anonymous commented in tuition class


    2010
    Nov
    13
    Sat
    2:30pm
     
    56

    Hahas, I made the same mistake too... I wrote down on the paper s but i put in calculator s^2 n got 17%>sig lvl n happily "There's insufficient evident to reject Ho, bla bla bla..." T_T I think they give u 2 marks for the unbiased estimates... but i think mayb there's ECF for our s^2 if our working n our conclusion fits it... But thats my opinion.. At least u get 2 marks ^_^

  57. just one question!'s Avatar
    just one question! commented in tuition class


    2010
    Nov
    13
    Sat
    3:27pm
     
    57

    hello thanks for uploading the answers! (:

    just one question! my friends and I are rather confused about question 10(i). it says "DRAW" the scatter diagram not the usual "SKETCH" we see. does this mean we have to use the graph paper? or only when they "PLOT" then we have to use the graph paper?

    thanks!!

  58. Anonymous's Avatar
    Anonymous commented in tuition class


    2010
    Nov
    13
    Sat
    3:52pm
     
    58

    I barely scraped a 70% on average for both paper.Guess I shall kiss my A goodbye 🙁

  59. Lithilara's Avatar
    Lithilara commented in tuition class


    2010
    Nov
    13
    Sat
    4:43pm
     
    59

    I certainly hope my careless mistake doesn't screw me over. I lost 7 marks from reading qn 8, assuming no method marks, cos I thought it was no. of ways. 🙁 and I thought they wanted f inverse graph for 3iii, Instead of dy/dx. Sighhhh.

  60. brian's Avatar
    brian  commented in tuition class


    2010
    Nov
    13
    Sat
    4:56pm
     
    60

    For 11 (v), it should be from -0.5 to 9.5 cos it cannot be negative. qn 3 also need to label y-intercept and max-min coordinates.

  61. Jt's Avatar
    Jt commented in tuition class


    2010
    Nov
    13
    Sat
    5:57pm
     
    61

    For Q11(v), since days cannot be negative I feel that the lower limit for normalcdf should be 0 and not -E99. what do you think?

  62. Applemydammple's Avatar
    Applemydammple commented in tuition class


    2010
    Nov
    13
    Sat
    6:31pm
     
    62

    Omg i only scored an average of 76 to 77 overall for both papers. theres goes my A and B. next need to retake already. D:

  63. anon's Avatar
    anon commented in tuition class


    2010
    Nov
    13
    Sat
    7:06pm
     
    63

    i lost marks for question 8 too): haha but if your paper 1 is good, you'll do fine luh. no worries((:

  64. elias's Avatar
    elias commented in tuition class


    2010
    Nov
    13
    Sat
    7:19pm
     
    64

    hi there. for question 11 (v), i believe if you approximate binomial to a normal, your lower limit for normalcdf should not be -E99 but -0.5 instead? since binomial values cannot take on negative values.

  65. zack's Avatar
    zack commented in tuition class


    2010
    Nov
    13
    Sat
    7:54pm
  66. orangejuice's Avatar
    orangejuice commented in tuition class


    2010
    Nov
    13
    Sat
    8:17pm
     
    66

    i accidentally used some correction tape during the exam..will they penalise me? :/
    and for those who said they have to kiss A gdbye when they get 76-78 i think thats quite...zz.seriously.there is hope since 75 is the min.

  67. jimbo's Avatar
    jimbo commented in tuition class


    2010
    Nov
    13
    Sat
    8:43pm
     
    67

    Hope seems bleak at times like this.
    Competitiveness its at its peak and the implementation of the bell curve and paranoia seems hard to ignore.

  68. Kidz's Avatar
    Kidz commented in tuition class


    2010
    Nov
    13
    Sat
    9:10pm
     
    68

    Just stop visiting this page. You are putting extra burden on your remaining papers by being a paranoid and too aware of these competition, which is likely illusionary.

    After the paper, you should be conditioning yourself for the remaining papers. Stay confident and don't discuss answers with peers and online =)

    I merely look through the method briefly w/o even checking the final answer.just to know that I'm on the right track.

  69. reyrtwe's Avatar
    reyrtwe commented in tuition class


    2010
    Nov
    13
    Sat
    9:33pm
     
    69

    why are there no answers for h1 math?!?????????????????????????????????????????????????????????????????????????????????????????????

  70. Kidz's Avatar
    Kidz commented in tuition class


    2010
    Nov
    13
    Sat
    9:44pm
     
    70

    opps, i meant extrapolating the competition you see here to the rest of the cohort hahaha.

    You know extrapolation is bad 😀

  71. untitled's Avatar
    untitled commented in tuition class


    2010
    Nov
    13
    Sat
    10:37pm
     
    71

    hi if i get ard 80 plus on average, would i still b able to get an A?

  72. untitled's Avatar
    untitled commented in tuition class


    2010
    Nov
    13
    Sat
    10:44pm
     
    72

    can someone pls enlighten me? i'm really scared that i cannot get an A.

  73. Anonymous's Avatar
    Anonymous commented in tuition class


    2010
    Nov
    13
    Sat
    10:58pm
     
    73

    I got about 60+ for Paper 1 and 70+ for Paper 2, this means getting an A is a no chance anymore right? And why are everyone here getting like 70-80+ on average for both papers! You guys are really smarty pants, should be from the top-end JCs?

  74. Anonymous's Avatar
    Anonymous commented in tuition class


    2010
    Nov
    13
    Sat
    11:20pm
     
    74

    Hmm I definitely agree that A should be 70~80. I mean you all are all worried bout getting As (including me)

    But technically n logically speaking, the bulk and mean of the belt curve actually lies on B. So, if A hits 85... technically people who are weaker scoring 60+ would be getting C or D... Ouch~.. And people whu gets low 50+ would be scoring S == which seems a lil too extreme...

    Ultimately, Cambridge should not be concern wif the large bulk of people getting As, ergo jusifying their actions to raise the bell curve to a 80+ to get As.. raising the bell curve would have detrimental to weaker students.. This seems largely unfair~

    And for some whu argued that "My fren nvr do prelim papers or last year paper could get 85+" cannot make the assumption that this generalises over the whole of Singapore.

    Our scope of argument only worries bout getting A... how bout the potential weakers student aiming to get B?

    Bell curve aims to (most of the time) make grades equally distributed and to reward student for their ability, and not to largely compare whu made more mistakes then the other (which largely would be the reason for not having 100 marks right now, right?). So, try be a lil optimistic (and practical lols...) and dun worry so much of getting B if u had around 80 marks. Cambridge is not out to slaughter us...

    Most likely though, there will be stricter marking to balance out~ Eg. -1 for not showing essential steps, statement or presentation seems too messy where workings are everywhere n ur arrows r flying left-right-top-bottom...

  75. Anonymous's Avatar
    Anonymous commented in tuition class


    2010
    Nov
    14
    Sun
    12:29am
     
    75

    How do people know the average marks for getting an A for the past few years? Does Cambridge reveal it?

  76. Mr Loi's Avatar
    Mr Loi Friend Mr Loi on Facebook commented in tuition class


    2010
    Nov
    14
    Sun
    1:05am
     
    76

    Alright everyone I've just uploaded version 1.2 of the H2 Maths Paper 2 solutions in respond to some of the feedback here, namely

    • Q3: Inserted nicer, high-tech versions of the graph sketched with turning points properly labeled
    • Q7(v): Updated workings to obtain 0.07 ≤ P(A' ∩ B ∩ C) ≤ 0.15 (instead of 0.03 ≤ P(A' ∩ B ∩ C) ≤ 0.15 in earlier version)
    • Q11(v): Replaced P(X < 10) with P(0 ≤ X < 10) as the probability to consider, since the lower limit of the number of days X cannot be < 0.

    Good night everyone for now!

  77. Joel's Avatar
    Joel  commented in tuition class


    2010
    Nov
    14
    Sun
    1:08am
     
    77

    Hi I was just wondering if you need to times 6C2 for qn11iv because it might be any 2 of the 6 days?

  78. Samantha's Avatar
    Samantha commented in tuition class


    2010
    Nov
    14
    Sun
    2:09am
     
    78

    Hey, i was just wondering about question 6. Since it's a two-tailed test, shouldn't the p-value we are comparing the obtained p-value against be 0.05 instead of 0.1?
    Anyway, thanks for the answers 😀

  79. hello's Avatar
    hello commented in tuition class


    2010
    Nov
    14
    Sun
    12:51pm
     
    79

    Heyhey thankyou so much for uploading the answer! Anw i have a shorter method to the probablity question q7(iv)
    P(A' n C) = P(A n B') + P(B) = 0.32 + 0.60 = 0.92
    Draw out the venn diagram and it is quite obvious. Anw iam so worried that the A standard would be like 90 omg. Else my A would be gone. Cos the most i can get is 80 overall. Everyone pray hard that it will be not be too high, perhaps 75. 75 is not v low right HAHA

  80. hi's Avatar
    hi commented in tuition class


    2010
    Nov
    14
    Sun
    11:33pm
     
    80

    oh dear how come everyone here's smart ): i seem to be the only one who found the math paper (1) tough because i got stumped by the differentiation qns. am ashamed for asking this but is there any rough gauge as to the passing mark thereabouts? yes i'm that terrible.

  81. black's Avatar
    black commented in tuition class


    2010
    Nov
    14
    Sun
    11:45pm
     
    81

    Hi, isn't the graph for 3 (b) (iii) wrong? I got the asymptote correct but I thought it should starting in the positive region then decreasing to touch x axis at turning pt of original graph then going into negative region and finally increasing to positive again? So end result would be something like U shape but not symmetrical?

Post a Comment

  • * Required field
  • Your email will never, ever be published nor shared with a Nigerian banker or a pharmaceutical company.
  • Spam filter in operation.
    DO NOT re-submit if your comment doesn't appear.
  • Spammers often suffer terrible fates.
*
*

Impress Miss Loi with beautiful mathematical equations in your comment by enclosing them within alluring \LaTeX [tex][/tex] tags (syntax guide | online editor), or the older [pmath][/pmath] tags (syntax guide). Please PREVIEW your equations before posting!

CommentLuv badge
 

 

Whatsapp Instagram Twitter Facebook Close Search Login Access RSS Joss Sticks Sessions Suggested Solutions Preview O Level Additional Mathematics O Level Elementary Mathematics Secondary Three Additional Mathematics Secondary Three Elementary Mathematics Secondary Two Mathematics Secondary One Mathematics Additional Mathematics 4038 Additional Mathematics 4018 Elementary Mathematics 4017 Virus Zoom