Question: On the midterm exam in introductory statistics, an instructor always gives a grade of B to students who score between 80 and 90. One year,

On the midterm exam in introductory statistics, an instructor always gives a grade of B to students who score between 80 and 90. One year, the scores have approximately a normal distribution with mean 83 and standard deviation 5. About what proportion of the students get a B?

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