SOLUTION: a couple plans to have four children. find the probability that the first three children are girls and the last child is a boy.
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Question 1138186: a couple plans to have four children. find the probability that the first three children are girls and the last child is a boy. Answer by ikleyn(52848) (Show Source):
The number of all possible configurations in this problem is = 16.
Any fixed configuration has the probability .
Answer. The probability under the question is .
