Question

The average of the first 6 scores was 12. The average of the next 12 scores was 36.

What was the overall average ?

Answer 1

28

Explanation:

Average of first 6 scores is 12, so the total of those 6 scores is 6 × 12 = 72.

Average of next 12 scores is 36, so the total of those 12 scores is 12 × 36 = 432.

Total of all 18 scores is 72 + 432 = 504.

Overall average is 504 ÷ 18 = 28.