<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:wfw="http://wellformedweb.org/CommentAPI/"
	xmlns:dc="http://purl.org/dc/elements/1.1/"
	xmlns:atom="http://www.w3.org/2005/Atom"
	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
	xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
	>

<channel>
	<title>Jφss Sticks &#187; A-Level Probability &amp; Statistics Questions</title>
	<atom:link href="http://www.exampaper.com.sg/category/questions/a-level-probability-statistics/feed" rel="self" type="application/rss+xml" />
	<link>http://www.exampaper.com.sg</link>
	<description>Sassy O Level Maths Tuition, Questions &#38; Tips from Singapore&#039;s Favourite Private Tutor</description>
	<lastBuildDate>Sat, 11 Feb 2012 04:21:26 +0000</lastBuildDate>
	<language>en</language>
	<sy:updatePeriod>hourly</sy:updatePeriod>
	<sy:updateFrequency>1</sy:updateFrequency>
	
<xhtml:meta xmlns:xhtml="http://www.w3.org/1999/xhtml" name="robots" content="noindex" />
		<item>
		<title>There Are Ninjas In Singapore</title>
		<link>http://www.exampaper.com.sg/questions/a-level-probability-statistics/there-are-ninjas-in-singapore</link>
		<comments>http://www.exampaper.com.sg/questions/a-level-probability-statistics/there-are-ninjas-in-singapore#comments</comments>
		<pubDate>Sun, 14 Dec 2008 12:09:21 +0000</pubDate>
		<dc:creator>Miss Loi</dc:creator>
				<category><![CDATA[A-Level Probability & Statistics Questions]]></category>

		<guid isPermaLink="false">http://www.exampaper.com.sg/questions/a-level-probability-statistics/there-are-ninjas-in-singapore</guid>
		<description><![CDATA[<p>11:59PM AM (TYPO!!!): Miss Loi waits patiently in the car, with sunglasses on. 12:00PM: Target appears &#8211; spotted walking towards another car. Miss Loi&#8217;s eyes brightens. *Grips steering wheel* 12:02PM: Aunty (i.e. The Target) takes an age to squeeze her groceries into car. Miss Loi getting impatient. 12:03PM: Aunty completes squeezing of groceries into car. [...]</p><p><small>&copy; 2007-2011 <a href="http://www.exampaper.com.sg">Jφss Sticks</a>. Copycats will be mercilessly hunted down.</small>
<br/>
<a rel="nofollow" href="http://www.facebook.com/pages/J&phi;ss-Sticks/148519971828291" title="Please 'like' the Joss Sticks Society on Facebook!"><img src="http://www.exampaper.com.sg/blog/wp-content/themes/exampaper/images/joss-sticks-society-rss.gif" alt="Please 'like' the Joss Sticks Society on Facebook!" /></a> <a rel="nofollow" href="http://twitter.com/MissLoi" title="Follow Miss Loi's Twitter!"><img src="http://www.exampaper.com.sg/blog/wp-content/themes/exampaper/images/twitter-badge-rss.gif" alt="Miss Loi's Twitter" /></a></p>]]></description>
			<content:encoded><![CDATA[<pre>11:59<del>PM</del> AM <span class="highlight">(TYPO!!!)</span>:</pre>
<p> Miss Loi waits patiently in the car, with sunglasses on.</p>
<pre>12:00PM:</pre>
<p> Target appears &#8211; spotted walking towards another car. Miss Loi&#8217;s eyes brightens. *Grips steering wheel*</p>
<pre>12:02PM:</pre>
<p> Aunty (i.e. The Target) takes an age to squeeze her groceries into car. Miss Loi getting impatient.</p>
<pre>12:03PM:</pre>
<p> Aunty completes squeezing of groceries into car. Aunty drives out of parking lot. Miss Loi takes off sunglasses and quickly zooms into vacated lot before the <i>Ah Beng</i> car behind beats her to it.</p>
<pre>12:04PM:</pre>
<p> After a <em>thorough</em> scan across the horizon, Miss Loi tears her <a rel="external nofollow" href="http://spring.ura.gov.sg/lad/ecitizen_housing/sp/parking/primary32.cfm">parking coupon</a> (like all good parking citizen should do), as shown below:</p>
<div class="img-div"><a href="http://www.flickr.com/photos/miss-loi/3105991089/" class="tt-flickr tt-flickr-Small" title="Miss Loi's Parking Coupon by Miss Loi, on Flickr"><img src="http://farm4.static.flickr.com/3235/3105991089_90115373e9_m.jpg" width="180" height="240" alt="Miss Loi's Parking Coupon" /></a>
<div class="caption">Miss Loi&#8217;s Parking Coupon<br/>- &#8220;scheduled&#8221; to start at 12:20PM</div>
</div>
<pre>12:05:00PM:</pre>
<p> Miss Loi <i>hippity-hippity</i> hops away from her car.</p>
<pre>1:20PM:</pre>
<p> Miss Loi <i>hippity-hippity</i> hops back to find this on her car:</p>
<div class="img-div"><a href="http://www.flickr.com/photos/miss-loi/3105991097/" class="tt-flickr tt-flickr-Small"><img src="http://farm4.static.flickr.com/3140/3105991097_10a21b14c3_m.jpg" alt="Ninja Shuriken" width="240" height="137" /></a>
<div class="caption">Ninja Shuriken &#8211; recovered at 12:08PM<br/>(click to enlarge)</div>
</div>
<pre>1:30PM:</pre>
<p> A distraught Miss Loi calls <a href="/category/mr-loi-the-a-level-tutor">Mr Loi</a>:</p>
<blockquote><p>Bro! You wouldn&#8217;t believe how SUAY I was at the carpark just now! I tore my coupon to start at 12:20PM, left my car at 12:05PM, and I got summoned at 12:08PM! They employ ninjas as parking attendants these days is it?!!!!</p></blockquote>
<p>Mr Loi replied in a calm voice:</p>
<blockquote><p>Sigh &#8230; that is a &#8216;hot&#8217; carpark with <strong>a parking attendant coming every hour</strong>. Please brush up your rusty <em class="highlight">A-Level Probability &#038; Statistics</em> and solve the following question to know your chances of getting caught, and try to lower your probability of getting caught the next time:</p></blockquote>
<div class="question">
<p>Assuming that the parking attendant visits the carpark once every hour, and that the probability of her turning up to check at any given minute is 1/60.</p>
<p>Miss Loi tears her coupon to commence at 12:20PM and left her car at 12:05:00PM.</p>
<ol>
<li>Find the probability of the parking attendant first appearing at 12:08PM.</li>
<li>Find the probability of Miss Loi getting caught i.e. the parking attendant appearing at anytime between 12:05-12:19PM.</li>
<li>What is the latest commencing time she should tear in her coupon in order to have at most a 10% chance of getting caught by the parking attendant?</li>
</ol>
<p><span class="fineprint">* Take each minute as a discrete random variable</span></p>
</div>
<pre>1:35PM:</pre>
<p> An angry Miss Loi hangs up the phone abruptly <img src='http://www.exampaper.com.sg/blog/wp-includes/images/smilies/icon_sad.gif' alt=':(' class='wp-smiley' /> </p>
<div id="related">
<h3>Related Posts</h3>
<ol>
		<li id="item-1">
	
	<a href="http://www.exampaper.com.sg/miss-loi-car/singapore-has-run-out-of-graph-paper" rel="bookmark">
		 
				<img src="http://www.exampaper.com.sg/blog/wp-content/themes/exampaper/timthumb.php?src=http://www.exampaper.com.sg/blog/wp-content/uploads/2009/02/scratched-car.jpg&amp;w=80&amp;h=70&amp;zc=1&amp;q=100" alt="Singapore Has Run Out Of Graph Paper" width="80" height="70" />
			
	</a>
	<a href="http://www.exampaper.com.sg/miss-loi-car/singapore-has-run-out-of-graph-paper" rel="bookmark">Singapore Has Run Out Of Graph Paper</a><!-- (7.7)-->
	
	</li>
		<li id="item-2">
	
	<a href="http://www.exampaper.com.sg/miss-loi-the-tutor/there-are-almost-20000-taxis-plying-the-streets-of-singapore" rel="bookmark">
		 
				<img src="http://www.exampaper.com.sg/blog/wp-content/themes/exampaper/timthumb.php?src=http://farm1.static.flickr.com/204/510758958_5eed322f5d_m.jpg&amp;w=80&amp;h=70&amp;zc=1&amp;q=100" alt="&#8220;There Are Almost 20,000 Taxis Plying The Streets Of Singapore&#8221;" width="80" height="70" />
			
	</a>
	<a href="http://www.exampaper.com.sg/miss-loi-the-tutor/there-are-almost-20000-taxis-plying-the-streets-of-singapore" rel="bookmark">&#8220;There Are Almost 20,000 Taxis Plying The Streets Of Singapore&#8221;</a><!-- (6)-->
	
	</li>
	</ol>
</div>
<p><small>&copy; 2007-2011 <a href="http://www.exampaper.com.sg">Jφss Sticks</a>. Copycats will be mercilessly hunted down.</small>
<br/>
<a rel="nofollow" href="http://www.facebook.com/pages/J&phi;ss-Sticks/148519971828291" title="Please 'like' the Joss Sticks Society on Facebook!"><img src="http://www.exampaper.com.sg/blog/wp-content/themes/exampaper/images/joss-sticks-society-rss.gif" alt="Please 'like' the Joss Sticks Society on Facebook!" /></a> <a rel="nofollow" href="http://twitter.com/MissLoi" title="Follow Miss Loi's Twitter!"><img src="http://www.exampaper.com.sg/blog/wp-content/themes/exampaper/images/twitter-badge-rss.gif" alt="Miss Loi's Twitter" /></a></p>]]></content:encoded>
			<wfw:commentRss>http://www.exampaper.com.sg/questions/a-level-probability-statistics/there-are-ninjas-in-singapore/feed</wfw:commentRss>
		<slash:comments>19</slash:comments>
		</item>
	</channel>
</rss>

