Question 539310: Manuel's quiz scores are 76, 81, and 77. What grade must he get on his fourth quiz to get an average of 80? Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! Manuel's quiz scores are 76, 81, and 77. What grade must he get on his fourth quiz to get an average of 80?
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76 + 81 + 77 = 234
4*80 = 320
320 - 234 = 86 needed
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or,
(76 + 81 + 77 + s)/4 = 80
234 + s = 320
s = 86
