Exhibit 6-8 The Life Expectancy of a Particular Brand of Tire Is

question 123

Multiple Choice

Exhibit 6-8
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 6-8. 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)0.5000

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