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What is the probability that a randomly selected tire

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The life expectancy of a particular brand of tire is normally distributed with a mean of 70,000 and a standard deviation of 10,000 miles.

a. What is the probability that a randomly selected tire will have a life of no more than 80,000 miles?

b. What is the probability that a randomly selected tire will have a life of at least 90,000 miles? 

c. What percentage of tires will have a life of 60,000 to 80,000 miles?

d. What is the probability that a randomly selected tire will have a life of exactly 80,000 miles?

Reference no: EM132529635

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