Answer:
count all the boxes it covers(that is your area)
answer : 27
Step-by-step explanation:
Given:
The frequency distribution table.
To find:
The mean average score on a test.
Solution:
The frequency distribution table is

x a xa
y b yb
z c zc
Sum a+b+c xa+yb+zc
Now, the mean average score on the test is


Therefore, the mean average score on the test is
.
20x3 would 60
Just mutiply the number fishes with 3
i will say you have the right answer selected in the photo