SOLUTION: He sits 6 exams and has a mean score of 57.5. He then sits another exam and scores 45. What is his mean score now?

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Question 1071490: He sits 6 exams and has a mean score of 57.5. He then sits another exam and scores 45. What is his mean score now?
Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!

His total score for the first 6 exams is 6*57.5 = 345
His new mean score after the 7th exam is therefore (345+45)/7 = 55.714
(In the final calculation, we divide by 7 because the 345 represents 6 exams while the 45 represents 1 exam, for a total of 7 exams.)