document.write( "Question 1172639: How many people would you need in a group to ensure a 99.9% probability of two of them sharing the same birthday?\r
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Algebra.Com's Answer #797778 by ikleyn(52816)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "For nice description of the  Birthday  Problem,  see this  Wikipedia article\r
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\n" ); document.write( "\n" ); document.write( "https://en.wikipedia.org/wiki/Birthday_problem\r
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\n" ); document.write( "\n" ); document.write( "https://en.wikipedia.org/wiki/Birthday_problem\r
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\n" ); document.write( "\n" ); document.write( "For the  99.9%  probability,  this article gives the answer  70  people in the group.\r
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