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Mathematics, 17.08.2020 21:01 Gideon3291

here are five number cards 2 5 7 8 9 one of the cards was removed and the mean average of the remaining four cards is 6. which card is removed? you must show your working

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here are five number cards 2 5 7 8 9 one of the cards was removed and the mean average of the remain...

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