Find the average of all scores if there are:

ten scores of 9

eight scores of 8

ten scores of 7

three scores of 6



Round to one decimal place.

2 answers

Wouldn't the average just be 7.8?
yes, because
(10*9 + 8*8 + 10*7 + 3*6)/(10+8+10+3) = 7.8

Before you post any more of these weighted average problems, John Mark, how about you show some of your work?