Question

I do not get this. Evaluate.
Simplify your answer as much as possible.
3!6!/5!2!

Answer 1

18

Explanation:

`(3!6!)/(5!2!)`

n! = n * (n-1)!

For example 7! can be written as 7 * 6!

3! is 3* 2!

6! is 6 * 5!

`(3!6!)/(5!2!)`

`(3*2!6*5!)/(5!2!)`

Cancel out 5! from the top and bottom . Also cancel out 2! from top and bottom.

`(3*2!6*5!)/(5!2!)`

3*6= 18