Percentage (Railway Maths) (Part – V)

Total Questions: 50

21. In an examination, 90% of the students passed and 600 students failed. How many students appeared for the examination? [RRB NTPC 08/04/2021 (Morning) ]

Correct Answer: (c) 6000
Solution:

22. 44% of a number is 798.6. What is 63% of that number? [RRB NTPC 08/04/2021 (Morning) ]

Correct Answer: (d) 1143.45
Solution:

23. If X’s income is 40% less than that of Y, then Y’s income is approximately what percentage more than that of X ? [RRB NTPC 08/04/2021 (Morning) ]

Correct Answer: (d) 66.67%
Solution:

24. If the salary of an employee is increased by 15% and subsequently reduced by 15%, then what will be the overall percentage reduction in the salary ? [RRB NTPC 08/04/2021 (Evening) ]

Correct Answer: (c) 2.25
Solution:

25. What is 2/5 as a percentage ? [RRB NTPC 24/07/2021 (Morning) ]

Correct Answer: (a) 40%
Solution:

26. If Mohan secured 72% marks in Physics and 68% in Chemistry, what percentage of marks did Mohan get in both subjects together, assuming that the two subjects have equal weightage? [RRB NTPC 26/07/2021 (Morning)]

Correct Answer: (a) 70%
Solution:

27. If a is 7.5% of b, b is 1.50% of c and d is 5% of c, then find a : d. [RRB NTPC 26/07/2021 (Evening)]

Correct Answer: (a) 9 : 400
Solution:

28. In an examination, 80% of the students passed in English, 85% passed in mathematics and 75% passed in both, English and mathematics. If 40 students failed in both the subjects, the total number of students is: [RRB NTPC 31/07/2021 (Evening) ]

Correct Answer: (b) 400
Solution:

29. 70% of the employees in a firm are men. 30% of men and 20% of women employees opt for voluntary retirement. What is the percentage of the total number of employees who continue in service? [RRB JE 22/05/2019 (Afternoon)]

Correct Answer: (d) 73%
Solution:

Let the total number of employees in the firm = 100
Number of male employees = 70
Number of female employees = 30
30% of male employees opt for voluntary retirement = 30/100 × 70 = 21
20% of female employees opt for voluntary retirement
= 20/100 × 30 = 6
Now, total number of male and female employees continue in service
= (70 - 21) + (30 - 6) = 49 + 24 = 73 %

30. The population of a city has been increasing at 5% every year. The present population is 185220. What was its population 3 years back? [RRB JE 22/05/2019 (Evening)]

Correct Answer: (c) 160000
Solution: