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The speeds of cars on a road are approximately normally

Question: The speeds of cars on a road are approximately normally distributed with a mean μ = 58 km/hr and standard deviation σ = 4 km/hr.

(a) What is the probability that a randomly selected car is going between 60 and 65 km/hr?

(b) What fraction of all cars are going slower than 52 km/hr?

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Mathematics: The speeds of cars on a road are approximately normally

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