Question

A survey of 160 people at a casino was conducted to determine the casino games that they typically play, and the following data were collected: 93 people played blackjack, 77 played roulette, and 39 played craps. 51 played blackjack and roulette, 22 played blackjack and craps, and 11 played roulette and craps. Nine people played all three games
a. how many of these people only played craps?
b. how many of these people did not play craps?
c. how many of these people played at least one of the three games?
d. how many of these people played blackjack or roulette?