Question

Two sections of a class took the same quiz. Section A had 15 students who had a mean score of 80, and Section B had 20 students who had a mean score of 90. Overall, what was the approximate mean score (to one decimal place) for all of the students on the quiz?

Answer 1

Answer:

85.7

Step-by-step explanation:

Given that two sections of a class took the same quiz. Section A had 15 students who had a mean score of 80, and Section B had 20 students who had a mean score of 90.

Section A total score = 15*80=1200

Section B total score 20*90 = 1800

Overall total score=3000

Overall total students = 15+20 =35

Hence overall mean = $\frac{3000}{35} \\=85.7143$

rounding off to one decimal place

overall mean = 85.7