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?

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Accepted Answer

1. Let the cost of pure milk be $1$ per unit.
2. He sells the mixture at this price, and he gains $25\%$, so $1 = 1.25	imes	ext{cost}_{mix}$.
3. Thus $	ext{cost}_{mix}=1/1.25=0.8$. This means milk is $0.8$ of the mixture and water is $0.2$.
4. Ratio water to milk = $0.2:0.8=1:4$.

FINAL_ANSWER: b

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