Average (Railway Maths) (Part – I)

Total Questions: 50

31. The total expenditure of Krishna in a year is ₹4,20,000. If his salary per month is ₹45,000, then find his average savings per month. [Group D 08/09/2022 (Morning) ]

Correct Answer: (b) ₹10,000
Solution:

32. The average sale of cars by a dealer per day in the month of March, other than on Saturdays and Sundays, is 125. The average sale of cars per day on Sundays is 150. What is the average sale of cars per day on Saturdays, if the first Saturday is on the 3rd of March and average sale of cars per day for the whole month is 130? [Group D 08/09/2022 (Evening) ]

Correct Answer: (b) 136
Solution:

33. There are 20 members in group A, 32 members in group B and 28 members in group C. All the members of these groups went to a restaurant. The average amount spent on each member of group A, B and C is ₹120, ₹125 and ₹100, respectively. The total average amount (in ₹) spent per member is: [Group D 08/09/2022 (Evening)]

Correct Answer: (a) 115
Solution:

34. A class of 20 students took a science test. 8 students had an average (arithmetic mean) score of 60. The remaining students had an average score of 40. The average score of the whole class is: [Group D 12/09/2022 (Morning)]

Correct Answer: (b) 48
Solution:

35. The average of the prime numbers between 11 and 30 is: [Group D 12/09/2022 (Afternoon)]

Correct Answer: (b) 20.2
Solution:

36. The average of 41 numbers is 62. The average of the first 18 numbers is 65.5 and the average of the last 24 numbers is 61.5. If the 18th number from the beginning is excluded, then what is the average of the remaining numbers? [Group D 12/09/2022 (Afternoon)]

Correct Answer: (a) 60.725
Solution:

37. The average of 3², 4², 5², 6² and 7² is ________. [Group D 14/09/2022 (Evening)]

Correct Answer: (b) 27
Solution:

38. The average of the first 35 natural numbers is ________. [Group D 15/09/2022 (Afternoon)]

Correct Answer: (d) 18
Solution:

39. The average weight of 6 persons increases by 2 kg when one of them whose weight is 72 kg is replaced by a new man.The weight of the new man is: [Group D 16/09/2022 (Morning) ]

Correct Answer: (b) 84 kg
Solution:

40. The average weight of 32 parcels was recorded as 96 kg. If the weight of one more parcel is included, the average is increased by 2 kg. The weight of the new parcel is: [Group D 16/09/2022 (Afternoon) ]

Correct Answer: (b) 162 kg
Solution: