Question

Find the value of n such that :

nP4 / n-1P4 = 5/3 , n>4

Answer 1

Hey mate here is your answer :

Given that :

nP4 / n-1P4 = 5/3

3n(n-1) (n-2) (n-3) = 5 (n-1) (n-2) (n-3) (n-4)

3n = 5 (n-4)

3n = 5n -20

2n = 20

n = 10

hope it helpful to you