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1. |
In what ratio must a mixture of 30% alcohol strength be mixed with that of 50% alcohol strength so as to get a mixture of 45% alcohol strength ? |
A. | 1 : 2 |
B. | 1 : 3 |
C. | 2 : 1 |
D. | 3 : 1 |
Answer» C. 2 : 1 | |