3 Pairs of pants

Question

 

Terry has 3 pairs of pants: black, khaki, and brown, and 4 shirts: yellow, red, blue, and white. He does not care which colors he wears together. If Terry chooses one pair of pants and one shirt at random, what is the probability that his outfit will be the black pants with the yellow shirt?

Answer 1

This problem is serving you with two probabilities:

1/ 3 pants are black

1/4 shirts are yellow

if we multiply these individual chances we see that 1/12 is the probability of picking that outfit.