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5) The average number of pages of a statistics book that a student can read in an hour is 7, with a standard deviation of

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5) The average number of pages of a statistics book that a student can read in an hour is 7, with a standard deviation of 1.5 and the population is normally distributed. What is the probability that a randomly selected student can read a) more than 11.5 pages in an hour? b) between 5 and 11.5 pages in an hour

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