Tire lifetimes: The lifetime of a certain type of automobile tire (in thousands of miles) is normally distributed with mean u=41 and standard deviation o -6, (a) What is the probability that a randomly chosen tire has a lifetime greater than 50 thousend miles? (b) What proportion of tires have lifetimes between 35 and 43 thousand mies? (c) What proportion of tires have lifetimes less than 46 thousand miles? Round the answers to at least four decimal places.

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