Asked by Anonymous
A class of 12 students has taken an exam, and the mean of their scores is 71. One student takes the exam late, and scores 92. After including the new score, what is the mean score for all 13 exams?
Answers
Answered by
Steve
(12*71 + 92)/13 = 72 8/13
Note that 92 = 71 + 13+8
Note that 92 = 71 + 13+8
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