Name: Bill
Who is asking: Parent
Question: Hi Bill,
We can list all possible outcomes. Here, for example, outcome BGBG means that
the oldest in the family is boy, after this girl, then boy again and the youngest is girl. So a list of all possible outcomes is BBBG GBBG BBGB GBGB BBGG GBGG BGBB GGBB BGBG GGBG BGGB GGGB BGGG GGGG We have 16 possible outcomes, from which only two satisfy your requirement: MMMM and GGGG. So, the answer is ^{2}/_{16} = ^{1}/_{8}. Andrei
