Average Problems Practice Question and Answer

Q: The average of 11 results is 50. If the average of first six results is 49 and and that of last six is 53, find the sixth result? 1215 0

  • 1
    56
    Correct
    Wrong
  • 2
    62
    Correct
    Wrong
  • 3
    50
    Correct
    Wrong
  • 4
    58
    Correct
    Wrong
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Answer : 2. "62"
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? 1209 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: 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? 1183 0

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

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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? 1174 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: Average weight of 24 students is 32 kg. If increase by 2 kg when a teacher joins the group. What will be the weight of teacher? 1160 0

  • 1
    82 kg
    Correct
    Wrong
  • 2
    84 kg
    Correct
    Wrong
  • 3
    80 kg
    Correct
    Wrong
  • 4
    85 kg
    Correct
    Wrong
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Answer : 1. "82 kg"

Q:

Find mean of first five prime number.

1156 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 mean of 14 observations is 11. One more observation is included and the new mean becomes 12. The  observation is

1140 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: The average value found for 20 observations was 75. It was noticed later that 97 was read as 79. So, what was the correct average value? 1109 0

  • 1
    75.7
    Correct
    Wrong
  • 2
    75.8
    Correct
    Wrong
  • 3
    75.9
    Correct
    Wrong
  • 4
    75.6
    Correct
    Wrong
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Answer : 3. "75.9"
Explanation :

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