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Theratiooftheredcardstoblackcardsinadeckis3:10 2 more red cards are added to the deck. The ratio of red cards to black cards is now 1:3 Work out the number of black cards in the deck.
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Theratiooftheredcardstoblackcardsinadeckis3:10 2 more red cards are added to the deck.

The ratio of red cards to black cards is now 1:3 Work out the number of black cards in the deck.

User Creynders
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User Jinzu
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