What is the formula for combination of possible orderings?

Factual Questions
1

This is a pretty basic question:

If you have, say, 10 speakers and they each speak one at a time, how many possible orders can they speak in?

2

10! = 3,628,800. You have 10 ways to choose the first speaker, then 9 for the second and so on.

3

Thanks! That’s it.