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
.
Answer:
the answer is 3
Step-by-step explanation:
is this a joke
Answer:

Step-by-step explanation:
Given :

Now,

Therefore, expression is equivalent to 
Answer:
The answer is C. -3/4x+4
Step-by-step explanation:
The answer will be 4.222222