SOLUTION: Jon's final exam was given 5 times the weight of a weekly test. The average of 15 weekly tests was 87. The overall weighted average was 85. What grade did he make on the final?
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Question 56720: Jon's final exam was given 5 times the weight of a weekly test. The average of 15 weekly tests was 87. The overall weighted average was 85. What grade did he make on the final? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Let the score on the final be "x".
Then:
[15*87+5x]/20=85
[1305+5x]=1700
5x=395
x=79
His score on the final was 79
Cheers,
Stan H.
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