Question

What is 5C3?

Answer 1

10

Explanation:

`nC_r=(n!)/(r!(n-r)!`

`5C_3=(5!)/(3!(5-3)!`

`=(5!)/(3!xx2!)`

`=(5xx4xxcancel(3!))/((2!)xxcancel((3!)`

`=20/2=10`