A bag contains 4 red, 5 blue, and 3 green marbles. What is the probability it is not green?

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• A 1/4
• B 3/4
• C 1/3
• D 1/2

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Answer: B. 3/4

Total marbles = 4 + 5 + 3 = 12. Marbles that are not green = 4 + 5 = 9. Probability = 9/12 = 3/4.

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