In a school, there are 35 students in class 2A and 40 in class 2B. The mean score for class 2 in an English Literature examination is 60.0 and that for 2B in the same paper is 52.5. Find, to one place of decimal, the mean for the combined classes
-
A.
2.5 -
B.
56.0 -
C.
56.2 -
D.
56.3 -
E.
6.5
Correct Answer: Option B
Explanation
Total score for 2A & 2B = 4200
mean score = (frac{4200}{40 + 35})
= (frac{4200}{75})
= 56