Question

Mrs. Jenkins just finished grading her math tests. The average score on her test was 93%. However, she forgot to grade Billy's paper. Billy scored 80% on the test. What is going to happen to the class average, once she includes Billy's score?

A.
The class average will stay the same.
B.
The class average will go up.
C.
The class average will go down.
D.
There is not enough information.

Answer 1

Including Billy's score of 80% will lower the class average from 93% because his score is below the initial average.

Step-by-step explanation:

When including Billy's test score of 80% into the class average that was previously 93%, the class average will definitely go down. This is because Billy's score is lower than the class average, so when it is factored into the overall calculation, it will decrease the average. Hence, the correct answer to the question is: C. The class average will go down.