Question

Average score of 10 boys in a class is 72 and average score of 8 girls in the class is 81. Find combined average of class. 
1. 74
2. 75
3. 76
4. 78

Answer 1

Correct Answer - Option 3 : 76

Given:

Average score of 10 boys in a class is 72 and average score of 8 girls in the class is 81.

Formula Used:

Weighted average (A’) = [n1A1 + n2A2] / [n1 + n2]

Calculation:

Combined average of class = [10 × 72 + 8 × 81] / [10 + 8]

= 1368/18

= 76