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1. |
A milkman makes 20% profit by selling milk mixed with water at $ 9 per litre. If the cost price of 1 litre pure milk is $ 10, then the ratio of milk and water in the said mixture is |
A. | 3 : 1 |
B. | 4 : 1 |
C. | 3 : 2 |
D. | 4 : 3 |
Answer» B. 4 : 1 | |