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24 October, 04:14

Sandra's scores on the first first 4 tests 87%, 92%, 76%, and 89%. What is the minumum score she needs to make on the fifth test so that her average is at least and 80%?

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  1. 24 October, 05:26
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    She needs a 56

    87+92+76+89=344

    400/5 = 80

    400-344=56
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