Two alcohol solutions, the ratio of alcohol to water in one alcohol solution is 5 to 2, and the ratio of alcohol to water in the other alcohol solution is 3 to 2. Now the two solutions (each 35 liters) are mixed together. What's the ratio of alcohol to water in the new solution?
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A7:2
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B4:3
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C2:1
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D23:10
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E23:12
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正确答案: E