Question

Simplify the expression.
5C3

Answer 1

C(5,3) means the number of ways to choose groups of 3 items from a set of 3. Order of selection does not matter.

C(5,3) = 5! /[ (3! * (5 - 3) ! ] = 5! / ( 3! *2!)
[ 5 * 4 * 3! ] /[ 3! * 2! ] =

[ 5 * 4] / 2! = 20/2 = 10. -->
Note that 2! = 2

Answer 2

Thanks.

Answer 3

Any one else want to try this?