Question: Average confusion. An instructor has a first-period class with 25 students, and they had a mean score of 86% on the midterm exam. The second-period

Average confusion. An instructor has a first-period class with 25 students, and they had a mean score of 86% on the midterm exam. The second-period class has 30 students, and they had a mean score of 84% on the same exam. Does it follow that the mean score for both classes combined is 85%? Explain.

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