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A bag contains 15 blue marbles, 5 red marbles, and 11 green marbles. How many blue marbles must be removed from the 31 marbles in the bag so that the probability of randomly drawing a blue marble is 1/3?

1. 7
2. 12
3. 6
4. 9
5. 11

1 Answer

10 votes

Answer:

7

Explanation:

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