20 customers are eating dinner at a local restaurant. the restaurant accepts cash or credit as forms of
payment. of the 20 customers, 4 have enough cash to pay for their meal, 16 have a credit card, and 3 have
enough cash and a credit card. using this information, answer each of the following questions.
let a be the event that a randomly selected customer has enough cash and b be the event that a
randomly selected customer has a credit card.
what is p(a), the probability that a customer has enough cash?
what is p(b), the probability that a customer has a credit card?
what is p(a and b), the probability that a customer has enough cash and a credit card?
what is p a or b), the probability that a customer has enough cash or a credit card?