A class of 10 students has an average score of 95. Another class of 15 students has an average score of 80. What is the weighted average?

Question

A class of 10 students has an average score of 95. Another class of 15 students has an average score of 80. What is the weighted average?

Answer 1

Average = TOTAL/COUNT

So

Average * count = total

THe total scores for each group is 10*95=950 and 15*80 = 1200

THe total combined score is 2150

The grand average is 2150/25 = 86