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= 9 choose 3

= 9! / 3! / (9-3)!

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Q: How many three person committees can be chosen from a group of nine people?
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How many two person committees can be chosen from a group of nine people?

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How many 4-person committees are possible from a group of 9 people if there are no restrictions?

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How many 4 person committees can be chosen from a group of 32?

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