A major airline keeps track of data on how their passengers redeem frequent flyer miles. They found that in the last year 58% of passengers redeemed them to purchase tickets for domestic travel, 44% redeemed them to purchase tickets for international travel, and that 16% redeemed them to purchase tickets for both domestic and international travel.
a. What is the probability that in the last year a passenger redeemed frequent flyer miles to purchase a ticket for domestic or international travel?
b. What is the probability that in the last year a passenger did not redeem frequent flyer miles to purchase a ticket for domestic or international travel?
c. Is redeeming frequent flyer miles to purchase a ticket for domestic and international travel disjoint or mutually exclusive? Explain.

Question

Quizplus · Accepted Answer

The Answer is a. 0.86 (0.58 + 0.44 - 0.16) general addition rule
b. 0.14 (1 - 0.86) complement rule
c. No, the intersection of these two events is not zero; a passenger could purchase tickets for both domestic and international travel.

A Major Airline Keeps Track of Data on How Their