400
There are 52 cards in a deck. There are 4 different suits (spades, clubs, hearts, and diamonds). Each suit has an Ace, 2,3,4,5,6,7,8,9,10, Jack, Queen, and King. If the deck is shuffled, what is the probability that a randomly selected card would be a Jack, Queen, or King?
12/52 = 3/13