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Anettt [7]
3 years ago
9

A family has ninenine children. if this family has exactly threethree boysboysâ, how many different birth and gender orders areâ

possible
Mathematics
1 answer:
Alenkasestr [34]3 years ago
7 0
This is the problem of how many permutations the set bbbgggggg has. The set has size n=9, and you choose p=3 boys.

You can calculate it as:

\binom{9}{3} = \frac{9!}{3! \cdot 6!} = \frac{362880}{6\cdot720} = 84


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