Question

How do you evaluate `""_14P _ { 5}`?

Answer 1

240, 240

Explanation:

The general formula for permutations is:

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

and so

`P_(14,5)=(14!)/((14-5)!)=(14!)/(9!)=(14xx13xx12xx11xx10xx9!)/(9!)=240,240`