Question

What's 8P8?

Answer 1

`P_(8,8)=(8!)/((8-8)!)=8! =40,320`

Explanation:

The permutation formula is:

`P_(n,k)=(n!)/((n-k)!); n="population", k="picks"`

and so

`P_(8,8)=(8!)/((8-8)!)=8! =40,320`

(remember that `0! = 1`)