Percentage (Railway Maths) (Part – III)

Total Questions: 50

31. x% of y is y% of: [RRB NTPC 20/01/2021 (Evening) ]

Correct Answer: (a) x
Solution:

xy/100 = y/100 × ? ⇒ ? = x

32. The ratio of the number of boys to that of the girls in a school is 3 : 2. If 20% of the boys and 25% of the girls are scholarship holders, find the percentage of those who are NOT scholarship holders. [RRB NTPC 21/01/2021 (Evening)]

Correct Answer: (b) 78%
Solution:

33. Farman has to secure 60% marks to pass. He got 60 marks and fail by 60 marks. What are the maximum marks? [RRB NTPC 22/01/2021 (Morning)]

Correct Answer: (d) 200
Solution:

34. The population of a town increases by 5% annually and its present population is 640000. What will its population be in 2 years time? [RRB NTPC 22/01/2021 (Morning)]

Correct Answer: (b) 705600
Solution:

35. If 20% of 160 + 10% of 50 = x − 1, then what will be the value of x? [RRB NTPC 22/01/2021 (Evening)]

Correct Answer: (c) 38
Solution:

36. 50% of a number added to 20% of 40 gives a sum of 20. What is the number? [RRB NTPC 22/01/2021 (Evening)]

Correct Answer: (b) 24
Solution:

Let number = X
X × 1/2 + 40/5 = 20 ⇒ X = 24

37. Fill in the blank ___% of 50 = 40. [RRB NTPC 23/01/2021 (Morning)]

Correct Answer: (b) 80
Solution:

x% of 50 = 40
⇒ x/100 × 50 = 40 ⇒ x = 80

38. If Sachin secures 70% marks in mathematics and 60% in science. What percentage of marks did Sachin get in both subjects together, assuming both subjects have equal maximum marks? [RRB NTPC 23/01/2021 (Morning)]

Correct Answer: (b) 65%
Solution:

Percentage of both subjects
= 60 + 70/2 = 65 %

39. 250 candidates appeared for an examination. Out of which 225 passed. The percentage of the candidates who passed is. [RRB NTPC 23/01/2021 (Evening)]

Correct Answer: (a) 90%
Solution:

percentage of passed candidates = 225/250 × 100 = 90 %

40. In maths, a student got 16% more marks in the second term than that in the first term. If he got 87 marks in the second term. What were his marks in the first term? [RRB NTPC 25/01/2021 (Morning)]

Correct Answer: (c) 75
Solution: