Provide an appropriate response.The sets of grades from different classes are recorded. In the first class, the mean is 80 and the standard deviation is 2. In the second class, the mean is 70 and the standard deviation is 5. In the third class, the mean is 72 and the standard deviation is 4. In which class is a student most likely to receive a grade of 72 or lower?
A. First class
B. Second class
C. Third class
Answer: B
Mathematics
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