The average score of 12 girls in a test was 16.5 and that of 18 boys in the same test was 16. The average score of girls and boys taken together in the same test was:
Answer
The correct answer is C: 16.2. Combined average = (12×16.5 + 18×16)/(12+18) = (198+288)/30 = 486/30 = 16.2.