There are two vessels containing the mixture of milk and water. In the first vessel the water is of the milk and in the second vessel water is just of the milk. In what ratio should we mix these liquids to obtain a mixture with a water to milk ratio of ?
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In the first vessel, concentration of water is 3 5 3 2 = 5 2 .
In the second vessel the concentration of water is 7 2 .
The resultant mixture should have a water concentration of 3 1 .
By allegation method, they will combine in the ratio of 2 1 1 : 1 5 1 = 1 5 : 2 1 = 5 : 7 .