Average Practice Question and Answer

Q: The average salary of all employees working in an office is Rs.8000. The average salary of 7 technicians is Rs 12000 and the average salary of rest of the workers is Rs.6000. The total no. of workers working in that office is- 1527 0

  • 1
    20
    Correct
    Wrong
  • 2
    21
    Correct
    Wrong
  • 3
    23
    Correct
    Wrong
  • 4
    22
    Correct
    Wrong
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Answer : 2. "21"
Explanation :

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Q:

The average age of 24 boys and their teacher is 15 years. When the teacher's age is excluded, the average age decreases by 1 year. The age of the teacher is: 

1518 0

  • 1
    40 Years
    Correct
    Wrong
  • 2
    41 Years
    Correct
    Wrong
  • 3
    38 Years
    Correct
    Wrong
  • 4
    39 Years
    Correct
    Wrong
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Answer : 4. "39 Years"

Q:

Find mean of first five prime number.

1503 1

  • 1
    4.5
    Correct
    Wrong
  • 2
    3.6
    Correct
    Wrong
  • 3
    5.4
    Correct
    Wrong
  • 4
    5.6
    Correct
    Wrong
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Answer : 4. " 5.6"

Q: The average of goods produced by a company every month is 4000 of average of last 3 month’s production. How many average goods should they produce every month in next 9 months so their monthly average production during a year will be 4375? 1502 1

  • 1
    4500
    Correct
    Wrong
  • 2
    4600
    Correct
    Wrong
  • 3
    4680
    Correct
    Wrong
  • 4
    4710
    Correct
    Wrong
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Answer : 1. "4500"
Explanation :

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Q: There are 40 boys in a class and average age of the class is 16 years. A boy of 17 years of age is replaced by another one, as a result average age becomes 15.875 years. Find the age of the new boy? 1482 0

  • 1
    12 years
    Correct
    Wrong
  • 2
    14.5 years
    Correct
    Wrong
  • 3
    15 years
    Correct
    Wrong
  • 4
    17 years
    Correct
    Wrong
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Answer : 1. "12 years"
Explanation :

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Q:

The average of 20 numbers is 32. If two numbers are 29 and 31, then what is the average of the remaining numbers (correct up to two decimals)? 

1482 0

  • 1
    31.24
    Correct
    Wrong
  • 2
    30.22
    Correct
    Wrong
  • 3
    34.44
    Correct
    Wrong
  • 4
    32.22
    Correct
    Wrong
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Answer : 4. "32.22"

Q:

The mean of 14 observations is 11. One more observation is included and the new mean becomes 12. The  observation is

1469 0

  • 1
    20
    Correct
    Wrong
  • 2
    24
    Correct
    Wrong
  • 3
    26
    Correct
    Wrong
  • 4
    28
    Correct
    Wrong
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Answer : 3. "26 "

Q: Average age of 12 men is 56 years. Two members of 60 years and 52 years die. What will the average age of the remaining members? 1468 0

  • 1
    54 years
    Correct
    Wrong
  • 2
    55 years
    Correct
    Wrong
  • 3
    56 years
    Correct
    Wrong
  • 4
    58 years
    Correct
    Wrong
  • Show Answer
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Answer : 3. "56 years "
Explanation :

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