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15 March, 01:30

A friend has a 84% average before the final exam for a course. That score includes everything but the final, which counts for 30% of the course grade. What is the best course grade your friend can earn? What is the minimum score would your friend would need on the final to earn a 75% for the course?

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  1. 15 March, 01:49
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    Best grade = (84%) (0.7) + ((100%) (0.3)

    =58.8+30

    =88.8

    What is the minimum score would your friend need on the final to earn 75% for the course

    Let x = minimum course

    84 (0.7) + 0.3x=75

    0.3x=75-84 (0.7)

    X=16/0.3

    =54
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