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Assume a normally distributed set of test scores with a mean of = 100 and a standard deviation of 20. Find the probability that a

Assume a normally distributed set of test scores with a mean of = 100 and a standard deviation of 20. Find the probability that a person selected at random will have a score of the following. (Round your answers to three decimal places.)(a) between 60 and 140 (b) less than 70

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