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
70 6
75 3
80 9
85 5
90 7
95 8

Answer 1

To find the mean, you need to first multiply each score by its corresponding number of students to get the total score for each score category. Then, you add up all the total scores and divide by the total number of students.

(70 x 6) + (75 x 3) + (80 x 9) + (85 x 5) + (90 x 7) + (95 x 8)

= 420 + 225 + 720 + 425 + 630 + 760

= 3180

Total number of students = 6 + 3 + 9 + 5 + 7 + 8 = 38

Mean score = 3180/38 ≈ 83.7

Rounded to the nearest tenth, the mean score is 83.7.

Answer 2

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
65 5
70 4
75 3
80 5
85 3
90 8
95 6
100 6

Answer 3

To find the mean, you need to first multiply each score by its corresponding number of students to get the total score for each score category. Then, you add up all the total scores and divide by the total number of students.

(65 x 5) + (70 x 4) + (75 x 3) + (80 x 5) + (85 x 3) + (90 x 8) + (95 x 6) + (100 x 6)

= 325 + 280 + 225 + 400 + 255 + 720 + 570 + 600

= 3375

Total number of students = 5 + 4 + 3 + 5 + 3 + 8 + 6 + 6 = 40

Mean score = 3375/40 ≈ 84.4

Rounded to the nearest tenth, the mean score is 84.4.