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Solutions A, B and C contain alcohol and water in the ratio of 3 : 7, 4 : 11 and 2 : 3, respectively. Four litres of A, five litres of B and three litres of C are mixed in a vessel. The percentage of alcohol in the resulting solution in the vessel is closest to:
- A32%
- B31%
- C28%
- D30%
Correct answer: B