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The speed of cars passing a given point on the freeway yielded a normal distribution of...

The speed of cars passing a given point on the freeway yielded a normal distribution of speeds, with a mean speed of 60.0 mph and a standard deviation of 5.0 mph. a) What is the chance that a single car travelled at a speed greater than 65 mph? b) What is the chance that a sample of 20 cars had an average speed greater than 62 mph? Show Steps please.

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