Solve.How much 12% alcohol solution should be mixed with a 4% alcohol solution to get 30 liters of 8% alcohol solution?
A. 15 L of 12%, 15 L of 4%
B. 18 L of 12%, 12 L of 4%
C. 20 L of 12%, 10 L of 4%
D. 9 L of 12%, 21 L of 4%
Answer: A
Mathematics
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