Two Physics classes at Jefferson High School took the same quiz. Mr. Spears had 20 students in his class with a mean score of 80. Mrs. Guyton's class of 30 students had a mean score of 90. Overall, what was the mean score for all students on the quiz?
A)84
B)85
C)86
D)87

Question

Quizplus · Accepted Answer

The overall mean score is calculated by taking the weighted average of the two classes' scores: (20*80 + 30*90) / (20+30) = 86.

Two Physics Classes at Jefferson High School Took the Same