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 7575 44 8080 11 8585 22 9090 11 9595 99

Answer 1

First, we need to calculate the sum of the products of each score and the number of students who received that score:

(75 * 44) + (80 * 11) + (85 * 22) + (90 * 11) + (95 * 99) = 3300 + 880 + 1870 + 990 + 9405 = 15545

Next, we need to calculate the total number of students:

44 + 11 + 22 + 11 + 99 = 187

Finally, we can calculate the mean by dividing the sum of the products by the total number of students:

15545 / 187 ≈ 83.1

Therefore, the mean of the scores is approximately 83.1.