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Mixtures and Alligations

Mixtures and Alligations: What is a mixture? Solved Exercises with Answers for Questions on Mixtures and Alligations

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Online Aptitude Questions with Answers on Mixtures and Alligations

Q1. **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?**

  1.  1/3
  2.  1/4
  3.  1/5
  4.  1/7

Solution : 1/5
Q2. **Tea worth Rs. 126 per kg and Rs. 135 per kg are mixed with a third variety in the ratio 1 : 1 : 2. If the mixture is worth Rs. 153 per kg, the price of the third variety per kg will be:**

  1.  Rs. 169.50
  2.  Rs. 170
  3.  Rs. 175.50
  4.  Rs. 180

Solution : Rs. 175.50
Q3. **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?**

  1.  10
  2.  20
  3.  21
  4.  25

Solution : 21
Q4. **A milk vendor has 2 cans of milk. The first contains 25% water and the rest milk. The second contains 50% water. How much milk should he mix from each of the containers so as to get 12 litres of milk such that the ratio of water to milk is 3 : 5?**

  1.  4 litres, 8 litres
  2.  6 litres, 6 litres
  3.  5 litres, 7 litres
  4.  7 litres, 5 litres

Solution : 6 litres, 6 litres

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Q5. **In what ratio must a grocer mix two varieties of pulses costing Rs. 15 and Rs. 20 per kg respectively so as to get a mixture worth Rs. 16.50 kg?**

  1.  3 : 7
  2.  5 : 7
  3.  7 : 3
  4.  7 : 5

Solution : 7 : 3
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