Question

If nPn-2 =60 find the value of n

Answer 1

nPn-2 = 60

n!/ {n-(n-2)}! = 60

n!/2! = 6 x 10

n! = 6 x 2 x 10

n! = 120

n! = 5!

n = 5

Answer 2

Answer:

wrong answer asnwers is 9