PERCENTAGE (CDS)

Total Questions: 31

21. (5/9)ᵗʰ part of the population in a village are males. If 30% of the males are married, the percentage of unmarried females in the total population is [2017 (I) Morning Shift ]

Correct Answer: (c) 27⁷⁄₉
Solution:Let the population of village = x

22. A candidate scoring x% marks in an examination and fails by a marks, while another candidate who scores y% marks gets b marks more than the minimum required pass marks. What is the maximum marks for the examination? [2016 (II) Evening Shift ]

Correct Answer: (c)
Solution:Let the maximum marks be M. ∴ Passing marks

23. The expenditure of a household for a certain month is ` 20000, out of which ` 8000 is spent on education, ` 5900 on food, ` 2800 on shopping and the rest on personal care. What percentage of expenditure is spent on personal care ? [2016 (I) Morning Shift ]

Correct Answer: (b) 16.5%
Solution:Given, total expenditure = ₹20000

24. The salary of a person is increased by 10% of his original salary. But he received the same amount even after increment. What is the percentage of his salary he did not receive? [2016 (I) Morning Shift ]

Correct Answer: (c) 100/11 %
Solution:Let the original salary be x.

25. In an election, 10% of the voters on the voter list did not cast their vote and 60 voters cast their ballot papers blank. There were only two candidates. The winner was supported by 47% of total voters in the voter list and he got 308 votes more than his rival. The number of voters on the voter list is [2015 (II) Evening Shift]

Correct Answer: (b) 6200
Solution:Let the number of voters on the voter list be x.

26. 20% of a number when added to 20 becomes the number itself, then the number is [2015 (II) Evening Shift]

Correct Answer: (b) 25
Solution:Let number be x.

27. A’s salary was increased by 40% and then decreased by 20%. On the whole, A’s salary is increased by [2015 (II) Evening Shift]

Correct Answer: (d) 12%
Solution:Let A’s salary be ₹x.


28. A person could save 10% of his income. But 2 yr later, when his income increased by 20%, he could save the same amount only as before. By how much percentage has his expenditure increased? [2015 (I) Morning Shift]

Correct Answer: (a) 22²⁄₉ %
Solution:Let the original income be ₹x.


29. If m% of m + n % of n = 2% of (m × n), then what percentage of m is n? [2014 (II) Evening Shift]

Correct Answer: (c) 100%
Solution:


30. On a 20% discount sale, an article costs ₹596. What was the original price of the article? [2014 (I) Morning Shift]

Correct Answer: (c) ₹745
Solution:Let the original price be ₹x. Since, at discount of 20% article costs ₹596.