Exhibit 6-6 The Life Expectancy of a Particular Brand of Tire Is

Multiple Choice

Exhibit 6-6
The life expectancy of a particular brand of tire is normally distributed with a mean of 40,000 and a standard deviation of 5,000 miles.
-Refer to Exhibit 6-6. What is the probability that a randomly selected tire will have a life of at least 30,000 miles?

A) 0.4772
B) 0.9772
C) 0.0228
D) None of the alternative answers is correct.