Question
In a mixture of wine and water, there is only 28% water.
After replacing the mixture with 5 litre of pure wine, the percentage of wine in the mixture becomes 74%. Find the quantity of new mixture?Solution
Ratio = 13:1  new mixture = 13 + 1 = 14 units  Mixture = 14 × 5 = 70 litre  Alternate Method:  Initially water is 28% and finally water is 24%  This means, 2% water is removed due to the removal of 5 litre of the mixture.  In other words, 5 litre of the mixture contains 2% of water  Therefore, to contain 28% of water, mixture quantity  = (5 x 28)/2  = 70 litre
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