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21 August, 04:46

A student earned grades of 84, 78, 84, and 72 on her four regular tests. She earned a grade of 78 on the final exam and 86 on her class projects. Her combined homework grade was 87. The four regular tests count for 40% of the course grade, the final exam counts for 30%, the project counts for 10%, and homework counts for 20%. What is her weighted mean grade? Round to one decimal place.

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  1. 21 August, 05:00
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    81.2

    Step-by-step explanation:

    Weighted average is 0.4 * ((84+78+84+72) / 4) + 0.3*78+0.1*86+0.2*87=81.2, thus the answer is 81.2
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