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# Sure Stone Tire Company has established that the useful life of a particular brand of its automobile tires is normally distributed with a mean of...

Sure Stone Tire Company has established that the useful life of a particular brand of its automobile tires is normally distributed with a mean of 40,000 miles and a standard deviation of 5000 miles. What is the probability that a randomly selected tire of this brand has a life of at least 50,000 miles?