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Assume that e...

Question

Assume that each childborn is equally likely to be a boy or a girl .if a family has three children, then conditional probability that two children are girls given that family has at least one girl child is

A

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B

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C

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D

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Solution

The correct option is B

Required probability $= \frac{3 c_{2}}{2^{3} - 1} = \frac{3}{7}$

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