A tire manufacturer advertises, "the median life of our new all-season radial tire is 120,000 kms. An immediate adjustment will be made on any tire that does not last 120,000 kms." You purchased four of these tires. What is the probability that all four tires will wear out before traveling 120,000 kms?
A) 1/10 or 0.10
B) ¼ or 0.25
C) 1/64 or 0.0156
D) 1/16 or 0.0625
E) None of the choices are correct

Question

Quizplus · Accepted Answer

The median life of 120,000 kms means that 50% of the tires will last less than 120,000 kms. The probability that one tire will wear out before 120,000 kms is 0.5. For four tires, the probability is (0.5)^4 = 1/16 or 0.0625.

A Tire Manufacturer Advertises, "The Median Life of Our New