### Home > CCG > Chapter 11 > Lesson 11.1.1 > Problem11-16

11-16.

If $n > 3$, write a shorter, equivalent expression for $n · (n − 1) · (n − 2) · (n − 3)$.

Use factorial form. Think of which factors will cancel.

$\frac{n!}{(n-4)!}$