Answer
$84.4$
Work Step by Step
To find the mean of the recorded scores, we need to first find the total score across each test and quiz.
Total = $72+83+79+85+91+93+80+95+82$
= $760$
Then, we need to divide this total by the number of scores there are, which is 9 in this case. So;
Mean = $\frac{760}{9}$
Mean = $84.4$
