Thread: Drug brand prob

A druggist wishes to select three brands of aspirin to sell in his store. He has five major brands to choose from: A, B, C, D and E. If he selects the three brands at random, what is the probability that he will select the following?

brand B


brands B and C

at least one of the two brands B and C

Originally Posted by Dadillar

A druggist wishes to select three brands of aspirin to sell in his store. He has five major brands to choose from: A, B, C, D and E. If he selects the three brands at random, what is the probability that he will select the following?

brand B


brands B and C

at least one of the two brands B and C

.

.

. Note that (why?).