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1. |
4 litre of a solution having 10% acid was mixed with 5 litre of a solution having 16% acid. Six litre of pure acid was then added to the resulting solution. The concentration of acid in the final solution is: |
A. | 48% |
B. | 50% |
C. | 54% |
D. | 60% |
Answer» B. 50% | |