Question

class A has 13 pupils and class b has 28 pupils both classes sit the same maths test the mean score for class A is 23 the mean score for class B is 57 what is the mean score (rounded to 2dp) in the maths test across both classes

Answer 1

46.22

Explanation:

Class A total= 23 x 13= 299

Clas B total= 57 x 28= 1596

total score= 299 + 1596 = 1895

total mean= 1895 ÷ (13+28) = 1895 ÷ 41

= 46.22