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
75 2
80 7
85 3
90 3
95 3

Explanation:

Step1: Calculate the sum of products

$(75\times2)+(80\times7)+(85\times3)+(90\times3)+(95\times3)=150 + 560+255 + 270+285 = 1520$

Step2: Calculate the total number of students

$2 + 7+3 + 3+3=18$

Step3: Calculate the mean

$\frac{1520}{18}\approx84.4$

Answer:

$84.4$