Question

I REALLY NEED THIS ANSWERED STRAIGHT AWAY PLEASE!!!!!! A juice company decides to test five different brands of juice. The different brands have been labeled A, B, C, D, AND E. The company decides to compare each brand with the other brands by pairing together different brands. How many different pairs will result by selecting two different brands at a time?

A.11
B.15
C.120
D.10

Answer 1

10 different pairs. Since there are 5 different brands you simply add 4+3+2+1 to get 10.