If the average score of 48 boys of a class is 120 , while the average score of 112 girls is 106 of the same class. Find the combined average of the class.
Answer & explanation
Correct answer: option 4
Ratio of Boys Girls
48 112
3 : 7 = 10 ( sum of number of boys and girls )
Average of 120 106
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Total = 120 × 3 106 × 7
Total = 360 742
Average (combined) = \(\frac{360+ 742}{10}\) = 110.2