Average : Aptitude Questions and Answers

Q51. A certain factory employed 600 men and 400 women and the average wager was Rs. 25.50 per day, If a woman got Rs. 5 less than a man, then what are their daily wages?

A. Man:27.50 Women:22.50

B. Man:24.50 Women:26.50

C. Man:26.50 Women:27.50

D. Man:25.50 Women:27.50

Q52. In an examination, a pupil’s average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination?

A. 9

B. 8

C. 11

D. 10

Q53. A pupil’s marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half. The number of pupils in the class is :

A. 39

B. 45

C. 37

D. 40

Q54. The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is :

A. 36.5

B. 42

C. 35

D. 40

Q55. The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is :

A. 11.5

B. 13.5

C. 12.5

D. 10.5

Q56. After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the ages of the replaced and the new member ?

A. 14

B. 13

C. 15

D. 12

Q57. 10 years ago, the average age of a family of 4 members was 24 years. Two children having been born (with age diference of 2 years), the present average age of the family is the same. The present age of the youngest child is :

A. 3

B. 2

C. 4

D. 1

Q58. A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is : 

A. 290

B. 297

C. 285

D. 305

Q59. The average age of 8 men is increased by years when two of them whose ages are 21 years and 23 years are replaced by two new men. The average age of the two new men is :

A. 20

B. 40

C. 50

D. 30

Q60. Of the four numbers, whose average is 60, the first is one-fourth of the sum of the last three. The first number is :

A. 36

B. 29

C. 48

D. 17