Question

There are 6 different cookies on a plate. Aiden will choose 2 of thes cookies to pack in his luch. How many different pairs of 2 cookies can he choose from the 6?

A. 12
B. 15
C. 30
D. 36

Answer 1

I think the answer is 15 with is B

Answer 2

We would use the method of combinations to solve this problem:

There are 6 cookies. Aidan chooses 2 of them:

(6C2) which is 6 choose 2, or (6 * 5)/2 = 15.

The answer is 15 pairs.