The Tread Life of a Particular Brand of Tire Is

Multiple Choice

The tread life of a particular brand of tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 2900 miles. What warranty should the company use if they want 96% of the tires to outlast the warranty?

A) 54,925 miles
B) 65,075 miles
C) 57,100 miles
D) 62,900 miles