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3. Let b 2 1 and g21 be integers. Consider b boys and g girls. How many ways are there to arrange these kids on

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3. Let b 2 1 and g21 be integers. Consider b boys and g girls. How many ways are there to arrange these kids on a line such that the leftmost kid is a girl or the rightmost kid is a boy? (e) g (b+g -1)!+b. (bg-bg (bg-1

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