Quiz  /  Mixture problems RRB (Railways) MCQ Questions With Answers

  • 1. 
    A mixture contains liquid A and liquid B in the ratio of 5 : 4. If 2 litres of liquid B is added to it, then the ratio of liquid A and liquid B becomes 7 : 6. What is the quantity (in litres) of liquid A in the mixture?

  • 32
  • 35
  • 40
  • 42

  • 2. 
    A mixture of wine and water contains 80% wine. In 50 liters of such a mixture, how many liters of water are required to increase the percentage of water to 50%?

  • 20
  • 30
  • 10
  • 40

  • 3. 
    The ratio of spirit and water in the two vessels is 5 : 1 and 3 : 7 respectively. In what ratio the liquid of both the vessels should be mixed such that a new mixture containing half spirit and half water is obtained?

  • 3 : 5
  • 5 : 7
  • 1 : 1
  • 4 : 7

  • 4. 
    A 24 liters of cough syrup and water mixture contains cough syrup and water in the ratio 3 : 5. What liters of the mixture should be taken out and replaced with pure cough syrup so that the final mixture contains syrup and water in equal proportions?

  • 20/3 liters
  • 3 liters
  • 32/5 liters
  • 24/5 liters

  • 5. 
    To get the profit of 25%, trader prepare the mixture of two different quality of wheat A and B of price per kg Rs.50 and Rs.30 respectively. If the ratio of A and B is 2 ∶ 3 in 1 kg, what is the selling price per kg of prepared mixture?

  • 45
  • 45.7
  • 47.5
  • 46

  • 6. 
    Rahul adds 2 litres of alcohol in 6 litres of water and Dinesh adds 1 litre of alcohol in 9 litres of water. What is the ratio of the percentage of alcohol in the two mixtures?

  • 7 ∶ 4
  • 2 ∶ 1
  • 5 ∶ 2
  • 8 ∶ 3

  • 7. 
    An alloy is made by mixing metal A costing Rs. 2000/kg and metal B costing Rs. 400/kg in the ratio A ∶ B = 3 ∶ 1. What is the cost (in Rs.) of 8 kilograms of this alloy?

  • 1600
  • 9800
  • 6400
  • 12800

  • 8. 
    Two mixtures have milk and water in the ratio 6 : 5 and 7 : 4. In what ratio should they be mixed so that ratio in final mixture becomes 7 : 5?

  • 7 : 5
  • 6 : 5
  • 7 : 4
  • 1 : 1

  • 9. 
    Three cans A, B and C are having mixtures of syrup and water in the ratio 1 ∶ 5 , 3 ∶ 5 and 5 ∶ 7 respectively. If the capacities of the cans are in the ratio 5 ∶ 4 ∶ 5, then find the ratio of syrup to water, if the mixtures of all the three cans are mixed together.

  • 44 ∶ 119
  • 24 ∶ 111
  • 46 ∶ 143
  • 53 ∶ 115

  • 10. 
    The amount of alcohol in two varieties of whiskey are 27% volume/volume and 42% volume/volume. In what ratio should they be mixed so that the mixture has 33% volume/volume alcohol?

  • 8 : 7
  • 3 : 2
  • 2 : 1
  • 1 : 1

  • 11. 
    In 1 kg mixture of sand and iron, 23% is iron. How much sand should be added so that the proportion of iron becomes 13%

  • 769.2 gms
  • 800 gms
  • 760.92 gms
  • Data insufficient

  • 12. 
    Two vessels A and B contain alcohol and water in the ratio 7 : 5 and 17 : 7 respectively. In what ratio should the mixtures from two vessels A and B be mixed to get a new mixture containing alcohol and water in the ratio 5 : 3?

  • 3 : 2
  • 2 : 1
  • 1 : 2
  • 3 : 4

  • 13. 
    In an alloy, lead and tin are in the ratio of 2 : 3. In the second alloy, the ratio of same elements is 3 : 4. If equal quantities of these two alloy are mixed to form a new alloy, then what will be the ratio of these two elements in the new alloy?

  • 1 : 3
  • 29 : 41
  • 25 : 37
  • 31 : 43

  • 14. 
    A butler stole wine from a bottle of Sherry which contained 18% of spirit and he replaced what he had stolen by wine containing only 8% spirit. The bottle was then 14% spirit strength only. How much of the bottle did he steal?

  • 1/4
  • 2/5
  • 3/5
  • 3/4

  • 15. 
    What quantity of water should be added to 5 L of 20% solution of salt, so that it becomes a 10% salt solution?

  • 3.5 L
  • 5.7 L
  • 5 L
  • Cannot be determined
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