Mathematics, 20.12.2020 08:20 sm908361

Mary has scored 78 , 60 , 82 , 94 , and 88 on her previous five tests . What score does she need on her next test so that her average ( mean ) is 80?

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Mary has scored 78 , 60 , 82 , 94 , and 88 on her previous five tests . What score does she need on...

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