Refer to Exercise 6.11. a. What is the probability that a customer does not use a credit card? b…. 1 answer below »

Refer to Exercise 6.11.
a. What is the probability that a customer does
not use a credit card?
b. What is the probability that a customer pays
in cash or with a credit card?
6.13 A survey asks adults to report their marital status.
The sample space is S = 5single, married,
divorced, widowed6 . Use set notation to represent
the event the adult is not married.