average MCQs – Page 3

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

average Mcqs

41. The average age of 15 students of a class is 15 years. Out of these, the average age of 5 students is 14 years and that of the other 9 students is 16 years. The age of the 15th student is____________?
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A. 15 years

B. 15 2/7 years

C. 11 years

D. 14 years

42. The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is___________?
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A. 17 kg

B. 31 kg

C. 26 kg

D. 20 kg

43. The average temperature for Monday, Tuesday, Wednesday and Thursday was 48 degrees and for Tuesday, Wednesday, Thursday and Friday was 46 degrees. If the temperature on Monday was 42 degrees. Find the temperature on Friday?
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A. 40 degrees

B. 36 degrees

C. 34 degrees

D. 38 degrees

44. The average of first 10 natural numbers is____________?
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A. 5.5

B. 6

C. 6.5

D. 5

45. The average of the marks of 12 students in a class is 36. If the marks of each student are doubled, find the new average?
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A. 72

B. 79

C. 37

D. 45

46. A trader purchased two colour televisions for a total of Rs. 35000. He sold one colour television at 30% profit and the other 40% profit. Find the difference in the cost prices of the two televisions if he made an overall profit of 32%?
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A. Rs. 19000

B. Rs. 21000

C. Rs. 24500

D. Rs. 17500

47. The average salary of workers in an industry is Rs.200 the average salary of technicians being Rs.400 and that of non-technicians being Rs.125. What is the total number of workers?
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A. 550

B. 275

C. 250

D. 400

48. 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___________?
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A. 35.2

B. 36.1

C. 39.1

D. 36.5

49. The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 12000 and the average salary of the rest is Rs. 6000. The total number of workers in the workshop is__________________?
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A. 21

B. 20

C. 23

D. 22

50. The average weight of a group of persons increased from 48 kg to 51 kg, when two persons weighing 78 kg and 93 kg join the group. Find the initial number of members in the group?
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A. 21

B. 23

C. 24

D. 22

51. The average of 9 observations was 9, that of the 1st of 5 being 10 and that of the last 5 being 8. What was the 5th observation?
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A. 7

B. 8

C. 6

D. 9

52. Find the average of all the numbers between 6 and 34 which are divisible by 5.
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A. 30

B. 24

C. 18

D. 20

53. The average of 13 numbers is 60. Average of the first 7 of them is 57 and that of the last 7 is 61. Find the 8th number?
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A. 32

B. 46

C. 68

D. 51

54. The average monthly salary of 20 employees in an organisation is Rs. 1500. If the managers salary is added, then the average salary increases by Rs. 100. What is the managers monthly salary?
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A. Rs. 2400

B. Rs. 3600

C. Rs. 2000

D. Rs. 4800

55. The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.
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A. 48 kg

B. 49.25 kg

C. 48.55 kg

D. 47.55 kg

56. The average of women and child workers in a factory was 15%yr. The average age of all the 16 children was 8yr and average age of women workers was 22 yrs if ten women workers were married then the number of unmarried women workers were________?
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A. 6

B. 16

C. 12

D. 8

57. The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?
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A. 0

B. 10

C. 1

D. 19

58. The average amount with a group of seven numbers is Rs. 20. If the newly joined member has Rs. 50 with him, what was the average amount with the group before his joining the group?
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A. Rs. 15

B. Rs. 22

C. Rs. 18

D. Rs. 25

59. Aftab bought 65 books for Rs.1150 from one shop and 50 books for Rs.920 from another. What is the average price he paid per book ?
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A. Rs.18

B. Rs.22

C. Rs.20

D. Rs.16

60. The average mark of the students of a class in a particular exam is 80. If 5 students whose average mark in that exam is 40 are excluded, the average mark of the remaining will be 90. Find the number of students who wrote the exam.
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A. 15

B. 25

C. 35

D. 20

Showing 41 to 60 of 95 mcqs