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16 August, 19:29

David made these grades on 5 math tests: 93, 87, 84, 96 and 80. what must he make on the 6th test to have an average of 90?

(explain)

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  1. 16 August, 21:21
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    The total of the 5 tests was 444, however the 6th test would have to be 96 in order to divide the 6 tests into a whole number 540 to get an average of 90
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