The table displays the scores of students on a recent exam. Find the mean of the scores to the nearest 10th.

Question

Score: 60, 65, 70, 75, 80, 85, 90, 95
Number of Students 4, 2, 4, 5, 3, 3, 8, 3

Answer 1

To find the mean, we need to take the sum of all the scores and divide by the total number of students:

((60 x 4) + (65 x 2) + (70 x 4) + (75 x 5) + (80 x 3) + (85 x 3) + (90 x 8) + (95 x 3)) / (4 + 2 + 4 + 5 + 3 + 3 + 8 + 3)

= (240 + 130 + 280 + 375 + 240 + 255 + 720 + 285) / 30

= 2525 / 30

= 84.17

Rounding to the nearest 10th, the mean score is 84.2.