In a two-child family one child is a boy. what is the probability that the other child is a girl
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answer is 1/2 as possible ways the second child is only two
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A family can have two children in 4 possible ways which are {BB, BG, GB, GG}.
Here we can ommit the last case as we know that the family already have a boy.
Then the total number of cases is 3 and the number of favourable cases is 2 i.e., {BG, GB}.
Therefore the probability of having the other child a girls is 2/3.
Here we can ommit the last case as we know that the family already have a boy.
Then the total number of cases is 3 and the number of favourable cases is 2 i.e., {BG, GB}.
Therefore the probability of having the other child a girls is 2/3.
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