SOLUTION: 25 students average 84 on a test. Another group of 20 students averages 66. Find the overall average.

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Question 961700: 25 students average 84 on a test. Another group of 20 students averages 66. Find the overall average.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The total scores of the first group:25%2A84=2100
The total scores of the second group:20%2A66=1320
The total scores of both: 2100%2B1320=3420
Now divide by the total number of students :25%2B20=45
A=3420%2F45
A=76