Bill had 5 tests over the marking period. He knows he is receiving a 85 on his report card. He was looking back at his test and only has fou

Question

Bill had 5 tests over the marking period. He knows he is receiving a 85 on his report card. He was looking back at his test and only has four grades: 80, 90, 100, 85. What was the score of the missing test? Please no silly answers or links ill report you.

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Thu Nguyệt 5 months 2021-08-18T14:39:35+00:00 1 Answers 1 views 0

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    2021-08-18T14:41:25+00:00

    Answer:

    70

    Step-by-step explanation:

    (Not the most streamlined way but.)

    Knowing that if he had 5 tests, and a mark of 85, we can determine the total average grade Bill received. 85*5=425

    Then subtract the known grades

    425-(90+85+100+80)=x

    425-(355)=x

    70=x

    Bill would have scored 70 on that 5th test

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