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The mean and standard deviation for the exam results from a class of 125 students were calculated, mean = 72, SD=12 with a normal distribution.

The mean and standard deviation for the exam results from a class of 125 students were calculated, mean = 72, SD=12 with a normal distribution. How many students would be expected to have a mark between C and A (60 and 90) ? Hint: you need to calculate the z score for both grades to get the total area. Can not have part of a student

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