Grear Tire Company has produced a new tire with an estimated mean lifetime milea

Question

Grear Tire Company has produced a new tire with an estimated mean lifetime mileage of 36,500 miles. Management also believes that the standard deviation is 5,000 miles and that tire mileage is normally distributed. To promote the new tire, Grear has offered to refund some money if the tire fails to reach 30,000 miles before the tire needs to be replaced. Specifically, for tires with a lifetime below 30,000 miles, Grear will refund a customer $1 per 100 miles short of 30,000. a) For each tire sold, what is the expected cost of the promotion? b) What is the probability that Grear will refund more than $50 for a tire? Expert Answer Anonymous answered this 320 answers Was this answer helpf Grear will return more than $50 for a tire means the tire will run 5000 miles short of 30000. So P( Grear will return more than $50) = P(X

Explanation / Answer

Formulas

probability = 0.0107

X 25000 mean 36500 sd 5000 z -2.3 probability (P(Z<z) 0.01072411

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