Carlson Jewelers permits the return of their diamond wedding rings,provided the return occurs within two weeks of the purchase date. Their records reveal that 10% of the diamond wedding rings are returned. Five different customers buy a wedding ring. What is the probability that none of the customers return a ring?
A)0.250
B)0.073
C)0.590
D)0.500

Question

Quizplus · Accepted Answer

The probability that a customer does not return a ring is 1 - 0.10 = 0.90. Since the purchases are independent events, the probability that none of the five customers return their rings is $0.90^5 = 0.59049$, which rounds to 0.590.

Carlson Jewelers Permits the Return of Their Diamond Wedding Rings,provided