Mixture and Alligation (SSC) (Part-2)

Total Questions: 36

21. 135 kg of an alloy A is mixed with 72 kg of alloy B to get a new alloy. If alloy A has zinc and copper in the ratio 4 : 5 and alloy B has zinc and copper in ratio 7 : 5, then what is the weight of zinc in the new alloy ? [SSC MTS 13/06/2023 (Morning)]

Correct Answer: (a) 102 kg
Solution:


22. An alloy contains copper, zinc and nickel in the ratio of 3 : 2 : 5 respectively. What quantity of nickel (in kg) must be added to 100 kg of this alloy to have the new ratio of copper, zinc and nickel 3:2:6 respectively ? [SSC MTS 20/06/2023 (Afternoon)]

Correct Answer: (b) 10 kg
Solution:

23. In a mixture, milk and water are in ratio of 1 : 4. Some milk is added to the mixture because of which ratio of milk and water becomes 2 : 1. How much milk was added as a percentage of the initial mixture ? [SSC CHSL 10/03/2023 (3rd Shift)]

Correct Answer: (a) 140 %
Solution:

24. 40 litres of milk are kept in a container. 4 litres of milk were removed from this container and replaced with water. This procedure was performed two more times. How much milk does the container now hold? [SSC CGL Tier II (02/03/2023)]

Correct Answer: (c) 29.16 litres
Solution:

25. How many kilograms of rice costing Rs.60 per kg must be mixed with 24 kg of rice costing Rs.42 per kg so that there may be a gain of 12% by selling the mixture at Rs.56 per kg ? [SSC CGL Tier II (07/03/2023)]

Correct Answer: (c) 19.2 kg
Solution:

26. A can of water and milk mixture contains 60% milk. A part of this mixture is replaced by another mixture containing 50% milk and the percentage of milk was found to be 52%. The quantity of mixture replaced is: [SSC CGL 13/12/2022 (2nd Shift)]

Correct Answer: (c) 4/5
Solution:

27. P and Q are two alloys of aluminium and copper. The ratios of aluminium and copper in P and Q are 5 : 11 and 3 : 5, respectively. If a third alloy is formed by mixing alloys P and Q in the ratio of 1 : 3, then aluminium is what percentage (rounded off to the nearest integer) of the copper in the third alloy ? [SSC CGL 13/12/2022 (4th Shift)]

Correct Answer: (d) 56 Percent
Solution:

28. The ratio of milk to water in a 100 litres mixture is 2 : 3. 10 liters of this mixture is withdrawn and replaced with milk. This process is repeated 2 more times. What is the percentage of milk in the final mixture ? [SSC CGL Tier II (08/08/2022)]

Correct Answer: (a) 56.26 percent
Solution:

29. A solution of 45% alcohol is mixed with a solution of 60% alcohol in the ratio of 2 : 3. In what ratio should the resultant solution be mixed with a 72% alcohol solution to get a 66% alcohol solution ? [SSC MTS 07/07/2022 (Morning)]

Correct Answer: (c) 1 : 2
Solution:

30. An alloy contains a mixture of two metals X and Y in the ratio of 2 : 3. The second alloy contains a mixture of the same metals, X and Y, in the ratio 7 : 3. In what ratio should the first and second alloys be mixed so as to make a new alloy containing 50% of metal X ? [SSC MTS 12/07/2022 (Afternoon)]

Correct Answer: (d) 2 : 1
Solution: