Question

In how many ways can four people sit in a row of five chairs?

Answer 1

`120`

Explanation:

In exactly as many ways that `5` people can, since any fifth person would only have one choice of chair - the empty one.

So the number of ways that `4` people can sit in `5` chairs is:

`5 xx 4 xx 3 xx 2 = 5 xx 4 xx 3 xx 2 xx 1 = 5! = 120`