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#1
05-02-2006, 02:12 PM
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semi crosspost penny problem
[ QUOTE ]
"There are 10 pennies in a jar. 9 of them are regular pennies, but the tenth penny is a fake coin with heads on both sides. You grab a penny at random and flip it 5 times. All 5 times it comes up heads. How likely is it that it was the 2 headed penny?" [/ QUOTE ] this was posed in the finance and investing forum but no answer was given, below is my (likely incorrect) solution. i'm getting 87.2% 1 - (.9/32 + .1) poor logic i'd assume. i feel so much dumber than like 5-6 years ago. anyone care to enlighten me? this is driving me crazy. <font color="white"> </font> 
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