Hi, I'm trying to simplify this but I get stuck at some point.
it goes 1/n! * C(n,2) * P(n,n-2)
1/n! * n!/2!(n-2)! * n!/(n - (n-2))!
which so far I have reduced down to
2! * (n-2)! * n! / (n - (n - 2))!
Is this correct? help with further simplification? Thank you!