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If the order is important, then: 9 choices for the first chair, 8 choices for the second, and 7 choices for the third = 9 x 8 x 7 = 504 ways. If order doesn't matter, then once you've picked 3 people, there are 6 ways to arrange them in the chairs, so divide by 6, or 84 ways.

See related link on combinations and permutations for more information on these types of problems.

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Q: How many ways can 9 people be seated if 3 chairs are available?
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