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of the 120 marbles in a jar are red. If 20 red marbles are taken out and 40 black marbles are added, what fraction of the marbles in the jar will be red?

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<img alt='Image' src='https://www.fatskills.com/images3/gre/inequ10_51.jpg'/><br> of the 120 marbles in a jar are red. If 20 red marbles are taken out and 40 black marbles are added, what fraction of the marbles in the jar will be red?






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