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A fair coin is flipped 3 times. The probability of getting exactly two heads, given that at least one flip results in a head, c...Asked by raja harishchandra
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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