Find four probabilities for each problem: P(A), P(B), P(A and B), and P(A or B).
You might need: Calculator


A standard deck of 52 cards contains 4 suits: hearts, clubs, diamonds, and spades. Each suit consists of cards numbered 2 through 10, a jack, a queen, a king, and an ace.
Zhi Qing decides to pick one card at random from a standard deck of 52 cards. Let A be the event that she chooses a three card and B be the event that she chooses a seven card.
What is P, left parenthesis, A, space, o, r, space, B, right parenthesis, the probability that the card Zhi Qing chooses is either a three or a seven?
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a proper fraction, like 1, slash, 2 or 6, slash, 10
  • an improper fraction, like 10, slash, 7 or 14, slash, 8
  • a mixed number, like 1, space, 3, slash, 4