Civil Service Exam Reviewer · Percentage · hard
50 liters of a 30% alcohol solution are mixed with 40 liters of a 80% alcohol solution. What is the alcohol concentration of the mixture?
- 55%
- 52.22%
- 110%
- 57.78%
Answer
B. 52.22%
Solution
Pure alcohol = 15 + 32 = 47 L in 90 L → 52.22%.
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