Question

ⁿP₃= 9240, find the value of n
Permutations and combinations

Answer 1

Answer:

Correct Option: C

nP3 = 9240 ⇒ n! / (n-3)! = 9240

⇒ n(n - 1)(n - 2) = 9240

⇒ n(n - 1)(n - 2) = 22 x 21 x 20

∴ n = 22