In how many ways can 9 people be seated if 3 chairs are a...
In how many ways can 9 people be seated if 3 chairs are available?
720
504
336
210
Correct answer is B
9P3 = | _9! | ways |
(9-3)! |
= | 9! |
6! |
= | 9x8x7x6! |
___6! |
= 504 ways
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