Average Practice Question and Answer

Q: Average age of 21 men reduces by 1 year when a man of 32 years is replaced by a child. What is the age of that child? 1382 0

  • 1
    10 years
    Correct
    Wrong
  • 2
    11 years
    Correct
    Wrong
  • 3
    9 years
    Correct
    Wrong
  • 4
    8 years
    Correct
    Wrong
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Answer : 2. "11 years"
Explanation :

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Q: The average of marks obtained by 14 students was 71, but it was found later that one of the student’s mark was accounted as 42 instead of 56 and for the other student; it was accounted as 74 instead of 32. So, the find the actual average? 1365 0

  • 1
    67
    Correct
    Wrong
  • 2
    68
    Correct
    Wrong
  • 3
    69
    Correct
    Wrong
  • 4
    71
    Correct
    Wrong
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Answer : 3. "69"
Explanation :

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Q: The average of marks obtained by 120 candidates in an examination is 35. The average of marks obtained by passed candidates is 39 and that of for failed candidates is 15. What is the no. of passed candidates? 1349 0

  • 1
    100
    Correct
    Wrong
  • 2
    120
    Correct
    Wrong
  • 3
    150
    Correct
    Wrong
  • 4
    140
    Correct
    Wrong
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Answer : 1. "100"
Explanation :

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Q:

The average of seven numbers is 18. If one of the number is 17 and if it is replaced by 31, then the average becomes: 

1330 0

  • 1
    20
    Correct
    Wrong
  • 2
    21
    Correct
    Wrong
  • 3
    21.5
    Correct
    Wrong
  • 4
    19.5
    Correct
    Wrong
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Answer : 1. "20 "

Q:

The average of marks scored by the students of a class is 68. The average of marks of the girls in the class is 80 and that of the boys is 60. What is the percentage of boys in the class? 

1326 0

  • 1
    65%
    Correct
    Wrong
  • 2
    70%
    Correct
    Wrong
  • 3
    40%
    Correct
    Wrong
  • 4
    60%
    Correct
    Wrong
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Answer : 4. "60% "

Q:

The average salary, per head, of all the workers of an institution, is Rs. 60. The average salary of 12 officers is Rs. 400; the average salary, per head, of the rest is Rs. 56. The total number of workers in the in situation is 

1326 0

  • 1
    1032
    Correct
    Wrong
  • 2
    1020
    Correct
    Wrong
  • 3
    1030
    Correct
    Wrong
  • 4
    1035
    Correct
    Wrong
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Answer : 1. "1032 "
Explanation :

Q:

The average weight of 15 oarsmen in a boat is increased by 1.6 kg when one of the crews, whose weighs 42 kg is replaced by a new man. Find the weight of the new man (in kg). 

1312 0

  • 1
    66
    Correct
    Wrong
  • 2
    43
    Correct
    Wrong
  • 3
    67
    Correct
    Wrong
  • 4
    65
    Correct
    Wrong
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Answer : 1. "66"

Q:

The average score obtained by Sandeep in 12 Tests is 25. Rumella has an average of 23 marks so far, but has competed in only 8 Tests. What average will Rumela have to earn in the remaining 4 Tests to be equal to Raghuveer's average?

1301 0

  • 1
    28
    Correct
    Wrong
  • 2
    29
    Correct
    Wrong
  • 3
    26
    Correct
    Wrong
  • 4
    27
    Correct
    Wrong
  • Show Answer
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Answer : 2. "29"

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