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	  <title>Ask MetaFilter questions tagged with haystacks</title>
      <link>http://ask.metafilter.com/tags/haystacks</link>
      <description>Questions tagged with 'haystacks' at Ask MetaFilter.</description>
	  <pubDate>Wed, 01 Dec 2004 07:40:26 -0800</pubDate> <lastBuildDate>Wed, 01 Dec 2004 07:40:26 -0800</lastBuildDate>

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	<title>What are the odds of finding 20 needles in 270 haystacks?</title>
	<link>http://ask.metafilter.com/12359/What%2Dare%2Dthe%2Dodds%2Dof%2Dfinding%2D20%2Dneedles%2Din%2D270%2Dhaystacks</link>	
	<description>Suppose there are 20 objects hidden in a collection of 270 haystacks.  What are your odds of searching 100 haystacks (assuming that if you choose to search a haystack with an object in it, you&apos;ll find that object) without finding an object?  My discrete math skillz have eroded to the point where any attempt to work this out myself yields preposterous numbers..</description>
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	<pubDate>Wed, 01 Dec 2004 07:40:26 -0800</pubDate>
	<category>haystacks</category>
	<category>math</category>
	<category>mathematics</category>
	<category>probability</category>
	<dc:creator>COBRA!</dc:creator>
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