A couple already has three children. All three children are
boys. Assume that the probabilities of the man fathering a boy or a girl are
.50 and .50, respectively. What is the probability that the fourth child will
also be a boy?
It is not matter that how much children couple has already.
So every new child will be 0.50 girl or boy
so therefore answer is probability that fourth child will be boy is 0.50
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