math
posted by mythreyee .
fred has 4 shirts. three are blue and one is red. he has tan pants and blue pants. the probability that fred will have on a red shirt and blue pants is
 out of 

The probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
red shirt = 1/5
blue pants = 1/2, assuming he only has one pair of each.