Mathematics, 05.01.2020 21:31 mathwiznot45

There are 5 cards: 2,5,7,8,9 one of the cards is removed and the mean average of the remaining 4 cards is 6 what card was removed

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There are 5 cards: 2,5,7,8,9 one of the cards is removed and the mean average of the remaining 4 ca...