Class A has 30 pupils and class B has 30 pupils. Both classes sit the same maths test. The mean score for class A is 41. The mean score for both classes is 53. What is the mean score in the maths test for class B?
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Total number of pupils in class A=30
Mean score of class A=41
Therfore total score of class A=41*30=1230
No of pupils in class B=30
Total pupils in class(a and b)=30+30=60
Total score of both the class=60*53=3180
Therfore total score of class B=Total score of both class-score of class A=3180-1230=1950
Mean score of class B=1950/30=65
Therfore mean score of class B=65.
Hope u understand it.
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