The sample space given here shows all possible sequences for a family with 4 children, where B stands for boy and G stands for girl.
Assume that all of the 16 outcomes are equally likely. Find the probability of having the following numbers of girls out of 4 children: (a) exactly 0 girls, (b) exactly 1 girl, (c) exactly 2 girls, (d) exactly 3 girls, (e) exactly 4 girls.
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