Alligation or Mixture problems
Two solution of 90% and 97% purity and mixed resulting in 21 liters of mixture of 94% purity. How much is the quantity of the first solution in the resulting mixture?

6 litres
15 litres
9 litres
12 litres

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Alligation or Mixture problems
A shopkeeper has 50 kgs of rice. He sells a part of it at 20% profit and the rest at 40% profit. If he gains 25% on the whole, find the quantity of each part.

12.5 kgs and 37.5 kgs
37.5 kgs and 12.5 kgs
21.5 kgs and 23.5 kgs
23.5 kgs and 21.5 kgs

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Alligation or Mixture problems
4 kg of a metal contains 1/5 copper and rest in Zinc. Another 5 kg of metal contains 1/6 copper and rest in Zinc.The ratio of Copper and Zinc into the mixture of these two metals:

None of these
49 : 221
39:231
94:181

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