SOLUTION: if the average of two tests is 78, what number has to be added to that to get an average of 84?

Question 745737: if the average of two tests is 78, what number has to be added to that to get an average of 84?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
if the average of two tests is 78, what number has to be added to that to get an average of 84?
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Total points for 2 that average 78 is 2*78 = 156
To get the average up to 84 you need 2*84 = 168 points
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Need an additional 12 points
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Cheers,
Stan H.
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