In a school, there are 35 students in class 2A and 40 in class 2B....

JAMB 1980

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

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Correct Answer: Option B

Explanation

Total score for 2A & 2B = 4200

mean score = \(\frac{4200}{40 + 35}\)

= \(\frac{4200}{75}\)

= 56

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In a school, there are 35 students in class 2A and 40 in class 2B....

Correct Answer: Option B

Explanation

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