Mathematics, 10.07.2019 15:20, joyce945

Two sections of a class took the same quiz. section a had 15 students who had a mean score of 80, and section b had 20 students who had a mean score of 90. overall, what was the approximate mean score for all the students on the quiz? a. 84.3b. 85c. none of these d. cannot be determined

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Two sections of a class took the same quiz. section a had 15 students who had a mean score of 80, an...