Question

Class A has 18 pupils and class B has 24 pupils.

Both classes sit the same maths test.
The mean score for class A is 76.
The mean score for both classes is 66.
What is the mean score (rounded to 1 DP) in the maths test for class B?

Answer 1

Answer: 56

Explanation:

66 x 2 = 132

132-76 = 56

(76+52) divided by 2 = 66

Hence the mean score for class B is 56.