Question

I DONT KNOW HOW TO DO IT PLEASE HELPPPPPPPPPPP

Answer 1

15

Explanation:

This 6C2 is derived from the format nCr, or in other words n choose r. This gives us the number of subsets of r elements, out of n elements;

`n! / r! * ( n - r )!`

Plug in the given values of 6 and 2 and solve for 6C2;

`(n!)/(r!\left(n-r\right)!) =\\(6!)/(2!\left(6-2\right)!) =\\(6!)/(2!\cdot \:4!) =\\\\\\(6\cdot \:5)/(2!) =\\(30)/(2!) =\\\\(30)/(2),\\\\Solution = 15`

Answer 2

15

Explanation:

use the formula

6!/(6-2)!2!

6!/4!2!

cancel the 4! to get...

6*5/2!

30/2=15