March 30, 2017

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The tread life of a particular tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 2000 miles. What is the probability that a randomly selected tire of this brand will last longer than 58,000 miles?

A.0.7266, B.0.8413, C.0.1587, D.0.2266

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