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Example The lifetime of ROAD tyre is normally distributed with mean 24000 km and standard deviation 4000 km. (a) Find the probability that the

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Example The lifetime of ROAD tyre is normally distributed with mean 24000 km and standard deviation 4000 km. (a) Find the probability that the lifetime of ROAD tyre exceeds 27000 km. (b) Find the probability that the lifetime of ROAD tyre is between 22500 km and 26500 km. (c) If 10% of ROAD tyres have low lifetime, find the maximum distance it can achieve.

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