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The table displays the scores of students on a recent exam. Find the mean of the scores to the nearest 10th.
Score Number of Students
6565 44
7070 88
7575 66
8080 33
8585 66
9090 66
Answer
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To find the mean of the scores to the nearest 10th, we need to multiply each score by the number of students who received that score, then add these products together, and finally divide by the total number of students.
Calculating:
(65*44) + (70*88) + (75*66) + (80*33) + (85*66) + (90*66) = 2860 + 6160 + 4950 + 2640 + 5610 + 5940 = 28160
Total number of students = 44 + 88 + 66 + 33 + 66 + 66 = 363
Mean = 28160 / 363 = 77.53
Therefore, the mean of the scores to the nearest 10th is 77.5.