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 2800 miles. What warranty
Should the company use if they want 96% of the tires to outlast the warranty?

A) 64,900 miles
B) 62,800 miles
C) 55,100 miles
D) 57,200 miles