JAMB - Mathematics (2009 - No. 44)
In how many ways can 9 people be seated if 3 chairs are available?
720
504
336
210
Explanation
| 9P3 = | _9! | ways |
| (9-3)! |
| = | 9! |
| 6! |
| = | 9x8x7x6! |
| ___6! |
= 504 ways
Comments (0)
| 9P3 = | _9! | ways |
| (9-3)! |
| = | 9! |
| 6! |
| = | 9x8x7x6! |
| ___6! |
= 504 ways
