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May 28, 2015

Homework Help: math

Posted by raja harishchandra on Wednesday, June 12, 2013 at 1:52am.

A fair coin is flipped 3 times. The probability of getting exactly two heads, given that at least one flip results in a head, can be written as a/b, where a and b are coprime positive integers. What is the value of a+b?

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