Statistics
posted by Drew .
Given a single deck of cards, what is the probability of drawing either a king or a diamond? Hint – There are four kings in a deck and 13 diamonds. There are a total of 52 cards in a single deck.

Since the king of diamonds counts once but not twice, there are 4 + 12 = 16 cards that are either kings or diamonds (or both). The answer is 16/52 = 4/13.