To find the mean, we need to multiply each score by the number of students who received that score, then add all the products together, and divide by the total number of students.
Mean = (75*77 + 80*66 + 85*22 + 90*99 + 95*88 + 100*11) / (77 + 66 + 22 + 99 + 88 + 11)
Mean = (5775 + 5280 + 1870 + 8910 + 8360 + 1100) / 363
Mean = 31295 / 363
Mean ≈ 86.24
So, the mean score of the exam is approximately 86.2 to the nearest tenth.
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
75 77
80 66
85 22
90 99
95 88
100 11
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