Traffic crash data show that average number of vehicle miles driven (VMD) between successive (reported) traffic crashes involving the same vehicle

Traffic crash data show that average number of vehicle miles driven (VMD) between successive (reported) traffic crashes involving the same vehicle can be modeled by a normal random variable with u = 80,000 miles and sigma = 40,000 miles. What is the probability that a vehicle will be driven at least 160,000 miles before crashing? What is the probability that a randomly selected vehicle’s VMD will lie between 60,000 and 100,000 miles since its previous crash?

Traffic crash data show that average number of vehicle miles driven (VMD) between successive(reported) traffic crashes involving the same vehicle can be modeled by a normal random variablewith u...