Answer the Question. -A Teacher Gives the Same Math Exam to Two Different

Multiple Choice

Answer the question.
-A teacher gives the same math exam to two different classes. The second class has more students than the first. The mean score for the first class is 70% and the mean score for the second class is
90%. What can you say about the mean score for both classes combined?

A) It is equal to 80%.
B) It may be higher or lower than 80%, this cannot be determined from the information given.
C) It is higher than 80%.
D) It is lower than 80%.