Question

If (n+1)P5 : nP5 = 3:2 then n is

Answer 1

Answer:

n=5

Step-by-step explanation:

(n+1)!/(n+1-5)!=n! /(n-5)!

n(n+1)!/(n-4)!=n(n+1)!/(n-5)!

1/n-4=1/1

n-4=1

n=1+4

n=5