SOLUTION: if my average is 83. i get a hundred on a test which counts as 50 % of my grade, what is my new average?!

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Question 730403: if my average is 83. i get a hundred on a test which counts as 50 % of my grade, what is my new average?!
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
The test is 50% of your grade. Assuming that the remaining stuff is worth 50% of your grade (100 - 50 = 50), this would mean

(Grade on Test)*(Weight of Test) + (Average on the remaining stuff)*(Weight of Remaining Stuff)

(1)*(0.5) + (0.83)*(0.5)

0.5 + 0.415

0.915

So the new average is now 91.5%

The reason for the big jump is that you got 100% (I think that's what you meant) on the test. The test is worth 50%, which is a significant portion. So that's why your grade went up so high.