Question

In the first group of 5, average was 6.5. In the second group of 15, the average was 4.5. What was the overall average of the two groups?

Answer 1

Explanation:

First group of five total score = 5 * 6.5 = 32.5

Group of fifteen total score = 15 * 4.5 = 67.5

total score of 20 is 67.5 + 32.5 = 100

Average = 100 /20 = 5.0