Question 936486: Danielle's test scores are 86,80,84, and 90. The final exam will count as two-thirds of the final grade. What score does Danielle need on the final in order to earn a B, which requires an average score of 80? What score does she need to earn an A, which requires an everage of 90?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Danielle's test scores are 86,80,84, and 90. The final exam will count as two-thirds of the final grade. What score does Danielle need on the final in order to earn a B, which requires an average score of 80? What score does she need to earn an A, which requires an everage of 90?
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Of the total 100 points offered,
33 1/3 points are available based on the 1st 4 tests::
She earned [(86+80+84+90)/4] = 85% of those points = 0.85*33 1/3 = 28 1/3
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66 2/3 points are available based on the final test::
For a B she needs 80-28 1/3 = 51 2/3 points
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She needs 51 2/3 of the 66 2/3 = 51.667/66.667 = 77.5% on the final to get a B
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She needs 61 2/3 of the 66 2/3 points or 61.667/66.667 = 92.5% on
the final to get an A
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Cheers,
Stan H.
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