SOLUTION: My 20% grades are 100, 99, 100, 100, 100, 100 My 80% grades are 39, 100 What is my grade average for the class?

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Question 645535: My 20% grades are 100, 99, 100, 100, 100, 100
My 80% grades are 39, 100
What is my grade average for the class?

Answer by Edwin McCravy(20060)   (Show Source): You can put this solution on YOUR website!
20% grades:  100, 99, 100, 100, 100, 100 

Find the average of your 20% grades  =  = 99.833333

80% grades:   39, 100 

Find the average of your 80% grades  =  = 69.5

Grade average for class = .20(20% average) + .80(80% average)

Grade average for class = .20(99.833333) + .80(69.5) = 75.166667.

Edwin




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