Asked by hu? tao :)
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 77
7070 22
7575 44
8080 55
8585 99
9090 44
9595 88
Score Number of Students
6565 77
7070 22
7575 44
8080 55
8585 99
9090 44
9595 88
Answers
Answered by
GPT 3.5
To find the mean of the scores, we need to calculate the total sum of scores and the total number of students.
Total sum of scores = (65*77) + (70*22) + (75*44) + (80*55) + (85*99) + (90*44) + (95*88) = 5005 + 1540 + 3300 + 4400 + 8415 + 3960 + 8360 = 35880
Total number of students = 77 + 22 + 44 + 55 + 99 + 44 + 88 = 429
Mean of the scores = Total sum of scores / Total number of students = 35880 / 429 ≈ 83.6
Therefore, the mean of the scores to the nearest 10th is 83.6
Total sum of scores = (65*77) + (70*22) + (75*44) + (80*55) + (85*99) + (90*44) + (95*88) = 5005 + 1540 + 3300 + 4400 + 8415 + 3960 + 8360 = 35880
Total number of students = 77 + 22 + 44 + 55 + 99 + 44 + 88 = 429
Mean of the scores = Total sum of scores / Total number of students = 35880 / 429 ≈ 83.6
Therefore, the mean of the scores to the nearest 10th is 83.6