A jar contains 10 red marbles and 30 green ones. How many red ma

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

11.

A and B are two alloys of gold and copper prepared by mixing metals in the ratio 7 : 2 and 7 : 11 respectively. If equal quantities of the alloys are melted to form a third alloy C, the ratio of gold and copper in C wil be

  • 5 : 7

  • 5 : 9

  • 7 : 5

  • 7 : 5

528 Views

12.

In a laboratory, two bottles contain mixture of acid and water in the ratio 2 : 5 in the first bottle and 7 : 3 in the second. The ratio in which the contents of these two bottles be mixed such that the new mixture has acid and water in the ratio 2 : 3 is

  • 4 : 15

  • 9 : 8

  • 21 : 8

  • 21 : 8

578 Views

Advertisement

13.

A jar contains 10 red marbles and 30 green ones. How many red marbles must be added to the jar so that 60% of the marbles will be red?

  • 25

  • 30

  • 35

  • 35


C.

35

Required solution:
rightwards double arrow space space open parentheses fraction numerator 10 plus straight x over denominator 30 end fraction close parentheses space equals space 60 over 40
rightwards double arrow space space fraction numerator 10 plus straight x over denominator 30 end fraction space equals space 6 over 4
rightwards double arrow space 180 space equals space 40 space space plus space 4 straight x
rightwards double arrow space space 4 straight x space equals space 140
rightwards double arrow space space space straight x space equals space 140 over 4 space equals space 35

328 Views

Advertisement
14.

A mixture contains 80% acid and rest water. Part of the mixture that should be removed and replaced by same amount of water to make the ratio of acid and water 4 : 3 is

  • 1 third rd
  • 3 over 7 th
  • 2 over 3 rd
  • 2 over 3 rd
977 Views

Advertisement
15.

Two vessels contain milk and water in the ratio 3 : 2 and 7 : 3. Find the ratio in which the contents of the two vessels have to be mixed to get a new mixture in which the ratio of milk and water is 2 : 1.

  • 2 : 1

  • 1 : 2

  • 4 : 1

  • 4 : 1

1305 Views

16.

300 grams of sugar solution has 40% of sugar in it. How much sugar should be added to make it 50% in the solution?

  • 40 gram

  • 10 gram

  • 60 gram

  • 60 gram

2156 Views

17.

Two blends of a commodity costing Rs. 35 and Rs. 40 per kg respectively are mixed in the ratio 2 : 3 by weight. If one-fifth of the mixture is sold at Rs. 46 per kg and the remaining at the rate of Rs. 55 per kg. the profit percent is

  • 50

  • 30

  • 40

  • 40

517 Views

18.

60 kg of an alloy A is mixed with 100 kg of alloy B. If alloy A has lead and tin in the ratio 3 : 2 and alloy B has tin and copper in the ratio 1 : 4, the amount of tin in the new alloy is

  • 53 kg

  • 44 kg

  • 80 kg

  • 80 kg

853 Views

Advertisement
19.

Three glasses of equal volume contains acid mixed with water. The ratios of acid and water are 2 : 3, 3 : 4 and 4 : 5 respectively. Contents of these glasses are poured in a large vessel. The ratio of acid and water in the large vessel is

  • 411 : 540

  • 401 : 544

  • 417 : 564

  • 417 : 564

910 Views

20.

Three containers have their volumes in the ratio of 3 : 4 : 5. They are full of mixtures of Milk and Water in the ratio of 4:1, 3:1 and 5:2 respectively. The contents of all these three containers are poured into a fourth container. The ratio of milk and water in the fourth container will be

  • 4 : 1

  • 151 : 48

  • 157 : 53

  • 157 : 53

2699 Views

Advertisement