In how many ways can 9 people be seated if 3 chairs are available?
- 720
-
504
- 336
- 210
The correct answer is: B
Explanation
| 9P3 = | _9! | ways |
| (9-3)! |
| = | 9! |
| 6! |
| = | 9x8x7x6! |
| ___6! |
= 504 ways
There is an explanation video available .