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Life of a tire follows normal distribution with a mean of 60,000 miles with standard deviation...

Life of a tire follows normal distribution with a mean of 60,000 miles with standard deviation of 5000 miles. A tire of the same kind is randomly selected. Find the probability that the tire will last


(a) more than 52,000 miles
(b) less than 68,000 but more than 52,000 miles
(c) more than 68,000 miles.

Math   Statistics-And-Probability   
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