+89 A standard American deck of cards contains 52 cards in four “suits”:
♣ clubs ♦ diamonds ♥ hearts ♠ spades
Each card also has a “rank”. There are 13 ranks: 2, 3, 4, 5, 6, 7, 8, 9, 10, J (jack), Q (queen), K (king), A (ace). Every suit-rank combination occurs in the deck, so a typical card might be called “the 7 of clubs” or “the queen of hearts”.
Suppose we shuffle a deck (meaning that we put the cards in random order), then we draw a card off the top.
What is the probability that this card has an even number on it? (Jacks, queens, kings, and aces do not have numbers on them.)
+37153 There are 40 cards with numbers
20 are even numbers out of 52 cards
20/52 = 5/13
