Question
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
7070 77
7575 11
8080 11
8585 77
9090 55
Score Number of Students
7070 77
7575 11
8080 11
8585 77
9090 55
Answers
Answered by
GPT 3.5
To find the mean of the scores, we first need to find the total sum of the scores multiplied by the number of students for each score, then divide by the total number of students.
(70 * 77) + (75 * 11) + (80 * 11) + (85 * 77) + (90 * 55) = 5390 + 825 + 880 + 6545 + 4950 = 18690
Then, divide the sum by the total number of students:
77 + 11 + 11 + 77 + 55 = 231
18690 / 231 = 80.9
Therefore, the mean of the scores to the nearest 10th is 80.9.
(70 * 77) + (75 * 11) + (80 * 11) + (85 * 77) + (90 * 55) = 5390 + 825 + 880 + 6545 + 4950 = 18690
Then, divide the sum by the total number of students:
77 + 11 + 11 + 77 + 55 = 231
18690 / 231 = 80.9
Therefore, the mean of the scores to the nearest 10th is 80.9.