Average (Railway Maths) (Part – I)

Total Questions: 50

41. The average weight of 11 students is 50 kg. When the teacher's weight of 70 kg is added to the total, then the new average weight will be: [Group D 18/09/2022 (Evening)]

Correct Answer: (d) 51.66
Solution:

42. The average score of a cricketer for 10 matches is 40 runs. If the average for the first six matches is 44, then the average runs of the last four matches is: [Group D 18/09/2022 (Evening)]

Correct Answer: (d) 34
Solution:

43. At a health club, 80% of the members are men and the remaining 20% are women. The average age of the male members is 30 years and the average age of the female members is 40 years. The combined average age of all the members of this health club is ____ years. [Group D 19/09/2022 (Afternoon)]

Correct Answer: (d) 32
Solution:

44. The mean weight of 18 jackfruits is 7.2 kg. If the weights of 2 more jackfruits whose weights are equal are added, the mean weight decreases by 20 gm. What is the weight of each jackfruit added later? [Group D 22/09/2022 (Evening)]

Correct Answer: (c) 7.00 kg
Solution:

45. The average score of a cricketer in his first 7 innings is 28 runs. His average score in the next 3 innings is 32 runs. Determine the score he should get in his 11th inning so that his overall average score becomes 33 runs. [Group D 27/09/2022 (Evening)]

Correct Answer: (d) 71
Solution:

46. The average of 7 numbers was given as 53. Later it was found that one number was misread as 68 instead of 58. What is the correct average of the given 7 numbers? [Group D 29/09/2022 (Evening)]

Correct Answer: (c) 59
Solution:

47. Vishnu purchased 8000 products for ₹1.2 each, another 3000 products for ₹1.5 each and another 5000 products for ₹1.4 each. Find the average cost per product. (Round the answer to two decimal places.) [Group D 29/09/2022 (Evening) ]

Correct Answer: (d) ₹1.32
Solution:

48. A study centre has 5 classes with 50, 60, 25, 40 and 70 students. The pass percentage of these 5 classes are 20%, 25%, 20%, 10%, 30%, respectively. Find the average number of students per class in the centre who passed. [Group D 06/10/2022 (Evening)]

Correct Answer: (c) 11
Solution:

49. The mean of the first 7 prime numbers is: [Group D 11/10/2022 (Morning)]

Correct Answer: (a) 58/7
Solution:

50. A class consisting of 30 students took a competitive exam. 18 of these students got an average of 90 marks and the remaining students of this class got an average of 80 marks. What is the average score of the class as a whole? [Group D 11/10/2022 (Afternoon)]

Correct Answer: (c) 86
Solution: