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please explain details 3. The final exam scores in a statistics class were normally distributed with a mean of 63 and a standard deviation of

please explain details

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3. The final exam scores in a statistics class were normally distributed with a mean of 63 and a standard deviation of five. a. Find the probability that a randomly selected student scored more than 65 on the exam. b. Find the probability that a randomly selected student scored less than 85

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