Question

If p (n,3)=1320what is n​

Answer 1

n=12

Explanation:

lol we meet again

just use the permutation formula for this one.

n!/(n-3)!=1320

[n×(n-1)×(n-2)×(n-3)!]/(n-3)!=1320

n(n-1)(n-2)=1320

(n²-n)(n-2)=1320

n³-3n²+2n-1320=0

n=12