(Answered) The top selling red and voss tire is rated 70000 miles

Statistics

The top selling Red and Voss tire is rated 70,000 miles, which means nothing, In fact, the distance the tires can run until they wear out is a normally distributed random variable with a mean of 82,000 miles and a standard deviation of 6,400 miles.

a. What is the probability that a tire wears out before 70,000 miles?

b. What is the probability that a tire lasts more than 100,000 miles?

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