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Brent counted 10 red cards, 10 black cards, and 20 blue cards in a deck of cards. What is the ratio of red cards to the other cards?

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10:40 = 1/4

1:1

1:3

1:3 because 10 + 20 is 30. So 10:30
Simplify that. 1:3 BOOM MAGIC ;D

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