The average score of 24 boys in an aptitude test is 72, and the average score of 16 girls in the same test is 82. What is the combined average score of all 40 students?
Answer and explanation
Correct answer: D.
- Step 1: Total score of boys: .
- Step 2: Total score of girls: .
- Step 3: Grand total of all 40 students: .
- Step 4: Combined average: .
Answer
76.0.
Why not the others: '' is unweighted average ; '' underweights girls.
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