SOLUTION: caleb's final exam was given 5 times the weight of a weekly test. the average of 15 weekly tests was 91. the overall weighted averagee was 85. what did caleb make on the final?

Question 907796: caleb's final exam was given 5 times the weight of a weekly test. the average of 15 weekly tests was 91. the overall weighted averagee was 85. what did caleb make on the final?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
caleb's final exam was given 5 times the weight of a weekly test. the average of 15 weekly tests was 91. the overall weighted averagee was 85. what did caleb make on the final?
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Total pts. from 15 weekly test = 15*91
Total pts. from final (which counts as 5 tests) = 5x
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Equation:
average = (total points)/(15+5)
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85 = (15*91+5x)/20
1700 = 1365 + 5x
5x = 335
x = 67 (His score on the final exam)
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Cheers,
Stan H.
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