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 1900 miles. What is the
Probability a certain tire of this brand will last between 56,010 miles and 56,580 miles?

A) .0180
B) .9813
C) .4649
D) .4920