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
80	4
85	6
90	7
95	2
100	7

Explanation:

Step1: Calculate total score for each group

For score 75: $75\times3 = 225$
For score 80: $80\times4 = 320$
For score 85: $85\times6 = 510$
For score 90: $90\times7 = 630$
For score 95: $95\times2 = 190$
For score 100: $100\times7 = 700$

Step2: Sum all total scores

Total score = $225 + 320 + 510 + 630 + 190 + 700 = 2575$

Step3: Calculate total number of students

Total students = $3 + 4 + 6 + 7 + 2 + 7 = 29$

Step4: Compute the mean

Mean = $\frac{2575}{29} \approx 88.8$

Answer:

88.8