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Higher Study | Quantitative Aptitude | Mixture Problems

In what ratio should a 20% methyl alcohol solution be mixed with a 50% methyl alcohol solution so that the resultant solution has 40% methyl alcohol in it?
How much water (in litres) must be added to 80 litres solution of milk and water containing 10% milk, so that it becomes a 5% milk solution?
20 kg of a mixture of wheat and husk contains 5% husk. How many kg more of husk must be added to make the husk content 20% in the new mixture?
The alcohol and water in a mixture are in the ratio of 7 : 8 respectively. If 11 litre water is added to it, then the ratio of alcohol and water in the new mixture becomes 3 : 5. What is the total quantity (in litres) of the alcohol in the new mixture?
A mixture of alcohol and water contains 7% alcohol. How much mixture (in litres) is required to get 357 litres of alcohol?
In what ratio must a mixture of 11% sugar strength be mixed with that of 25% sugar strength so as to get a new mixture of 13% sugar strength?
A vessel is filled with liquid, 3 parts of which are water and 5 parts syrup. How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?
A can contains a mixture of two liquids A and B is the ratio 7 : 5. When 9 litres of mixture are drawn off and the can is filled with B, the ratio of A and B becomes 7 : 9. How many litres of liquid A was contained by the can initially?
Three vessels, whose capacities are 3, 4, and 5 liters, contain solutions of acid and water, in which the ratio of acid and water is 2 : 3, 3 : 7, and 4 : 11 respectively. The ratio of acid and water in the final solution thus obtained is:
Ram has 96 kg of sugar, he sells one part at 20% profit and the remaining at 12% loss. He gains 16% on the whole quantity, find the quantity sold at 12% loss?
A merchant has 800 kg of sugar. He sells a part of it at 10% and rest at 15% profit. If overall he gains 12% on whole. The quantity sold at 15% is ?
The price of two kinds of juices is Rs. 28 per kg and Rs. 56 per kg respectively. Both the juices are mixed in the ratio 4 : 9. Find the price of mixed juice per kg (to the neatest whole number)? 
A merchant has 1550 kg of rice, one type of rice he sells at 15% profit and the other type at 20% profit. In the whole transaction, he gains 17%. What is the quantity of rice that was sold in profit of 20%? 
A shopkeeper has 1400 kg of wheat, one type of wheat he sells at 28% profit and the other type he sells at 35% profit. In the whole transaction, he gains 30%. Find the quantity sold at 28% profit?
The average weight of boys in the class is 50 kg and girls is 70 kg. If the average weight of whole class is 55.Find the ratio of boys and girls in the class
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