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In what proportion must water be added with milk to get a gain of 20% by selling the mixture at cost price? |
1 : 5 4 : 1 5 : 1 1 : 4 |
1 : 5 |
20% = \(\frac{1}{5}\) As water is free, so there is the cost of milk only. Milk cost = 5 Profit = 5 × \(\frac{1}{5}\) = 1 Water : Milk 1 : 5 |
