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10 December, 18:29

On his last three tests, Mark scored 85, 95, 80. What grade must he get on his next test to have an average of 90 for all four tests

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  1. 10 December, 18:38
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    Answer: 100

    Step-by-step explanation:

    85+95+80=260 divided by 3 is 86.6 repeating and getting 100 on his next test would add up to 360 and 360/4 is 90
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