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4. 40% of the marbles in a bag are yellow. The rest are orange and green. The ratio of the number of orange to the number of green is 4: 5. If there are 30 green marbles, how many yellow marbles are there? Use a visual model to show your answer.

User JasonBock
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I dont really understand this question, i really would of liked to help.
User BhushanVU
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