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A milkman mixes water with pure milk. If he sells the mixture at the cost price of pure milk and makes a profit of 25%, what is the ratio of water to milk in the mixture?
- 1:3
- 1:4
- 1:5
- 2:5
Correct answer: 1:4
Solution
Selling the mixture at the cost price of pure milk while making 25% profit means the cost of milk forms only 80% of the selling value. Thus water is 20% and milk is 80%, giving water : milk = 20 : 80 = 1 : 4.
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