Mathematics, 28.11.2020 05:50, bullockarwen

with a mean average speed of 89 miles per hour and a standard deviation of 6.5 miles per hour. (a) What is the probability that a train will average less than 69 miles per hour? (b) What is the probability that a train will average more than 80 miles per hour? (c) What is the probability that a train will average between 91 and 100 miles per hour?

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with a mean average speed of 89 miles per hour and a standard deviation of 6.5 miles per hour. (a) W...