A cola company decides to test five different brands of soft drink. The different brands have been labeled F, G, H, I, and J. Th
e company decides to compare each brand with the other brands by pairing them together. How many different pairs will result from selecting two different brands at a time?
Cola F can go with G,H,I,J (4 pairs) - Cola G can go with H,I,J (3 pairs) - Cola H can go with I,J (2 pairs) - Cola I can go with J (1 pair) As a result there are ten total pairs.
