average MCQs – Page 4

Practise focused average questions with marked answers for exam preparation and subject revision.

average Mcqs

61. The average age of a group of 10 persons was decreased by 3 years when one person, whose age was 42 years, was replaced by a new person. Find the age of the new person?
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A. 8

B. 24

C. 22

D. 12

62. Five years ago the average of the ages of A and B was 40 years and now the average of the ages of B and C is 48 years. What will be the age of the B ten years hence?
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A. 58 years

B. 55 years

C. Data inadequate

D. 56 years

63. The average of first five prime numbers greater than 20 is____________?
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A. 32

B. 31.01

C. 31

D. 32.2

64. The average of 35 students in a class is 16 years. The average age of 21 students is 14. What is the average age of remaining 14 students?
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A. 15 years

B. 17 years

C. 19 years

D. 18 years

65. The average age of seven persons sitting in a row facing east is 28 years. If the average age of the first three persons is 21 years and the average age of the last three persons is 34 years, then find the age of the person sitting in the middle of the row?
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A. 26 years

B. 33 years

C. 31 years

D. 30 Years

66. A batsman in his 17th innings makes a score of 85 and their by increasing his average by 3. What is his average after the 17th innings?
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A. 34

B. 35

C. 36

D. 37

67. The average of 10 numbers is 23. If each number is increased by 4, what will the new average?
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A. 29

B. 25

C. 27

D. 22

68. The average runs scored by a batsman in 20 matches is 40. In the next 10 matches the batsman scored an average of 13 runs. Find his average in all the 30 matches?
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A. 30

B. 31

C. 29

D. 28

69. The average of non-zero number and its square is 5 times the number. The number is__________?
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A. 17

B. 9

C. 29

D. 295

70. The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average of the team?
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A. None of these

B. 25 years

C. 24 years

D. 23 years

71. A building contractor employs 20 male, 15 female and 5 child workers. To a male worker he pays Rs.25 per day, to a female worker Rs.20 per day and a child worker Rs.8 per day. The average wage per day paid by the contractor is__________?
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A. Rs.20

B. Rs.22

C. Rs.23

D. Rs.21

72. The average salary of a person for the months of January, February, March and April is Rs.8000 and that for the months February, March, April and May is Rs.8500. If his salary for the month of May is Rs.6500, find his salary for the month of January?
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A. 4500

B. 3000

C. 5000

D. 2500

73. The average of 11 results is 50, if the average of first six results is 49 and that of the last six is 52. Find the sixth result?
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A. 46

B. 56

C. 34

D. 57

74. In an examination a pupils 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?
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A. 9

B. 10

C. 8

D. 11

75. The average age 9 members of a committee are the same as it was 2 years ago, because an old number has been replaced by a younger number. Find how much younger is the new member than the old number?
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A. 7 years

B. 18 years

C. 27 years

D. 11 years

76. The average of first 10 even numbers is___________?
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A. 11

B. 22

C. 9

D. 18

77. The average of 1st 3 of 4 numbers is 16 and of the last 3 are 15. If the sum of the first and the last number is 13. What is the last numbers?
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A. 2

B. 5

C. 6

D. 8

78. The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ration of the number of boys to the number of girls in the class is___________?
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A. 1:02

B. 2:3

C. 3:05

D. 3:04

79. The present average age of a family of five members is 26 years. If the present age of the youngest member in the family is ten years, then what was the average age of the family at the time of the birth of the youngest member ? (Assume no death occurred in the family since the birth of the youngest).
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A. 18 years

B. 14 years

C. 16 years

D. 20 years

80. The average height of 35 boys in a class was calculated as 180cm. It has later found that the height of one of the boys in the class was wrongly written as 166 cm whereas his actual height was 106 cm. Find the actual average height of the boys in the class (Round off your answer to two decimal places)?
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A. 179.29 cm

B. 178.39 cm

C. 179.38 cm

D. 178.29 cm

Showing 61 to 80 of 95 mcqs