Average Questions Practice Question and Answer

Q:

Find the average of all prime numbers between 30 and 50.

1841 0

  • 1
    41.8
    Correct
    Wrong
  • 2
    38.8
    Correct
    Wrong
  • 3
    37.8
    Correct
    Wrong
  • 4
    39.8
    Correct
    Wrong
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Answer : 4. "39.8"

Q:

A cricketer had a certain average of runs for his 64 innings. In his 65th innings, he is bowled out for no score on his part. This brings down his average by 2 runs. His new average of runs is: 

1837 0

  • 1
    70
    Correct
    Wrong
  • 2
    68
    Correct
    Wrong
  • 3
    130
    Correct
    Wrong
  • 4
    128
    Correct
    Wrong
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Answer : 4. "128 "

Q:

The average weight of 29 students is 40 kg. If the weight of teacher be included the average weight increased by 400 gms. The weight of the teacher is-

1828 0

  • 1
    50 kg
    Correct
    Wrong
  • 2
    49 kg
    Correct
    Wrong
  • 3
    52 kg
    Correct
    Wrong
  • 4
    55 kg
    Correct
    Wrong
  • 5
    None of these
    Correct
    Wrong
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Answer : 3. "52 kg "

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Answer : 3. "39"

Q: The twice of sum of the ages of a father and his son is 8 times the age of the son. If the average age of the father and the son is 30 years, what is father's age ? 1805 0

  • 1
    42 yrs
    Correct
    Wrong
  • 2
    45 yrs
    Correct
    Wrong
  • 3
    36 yrs
    Correct
    Wrong
  • 4
    38 yrs
    Correct
    Wrong
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Answer : 2. "45 yrs"
Explanation :

Answer: B) 45 yrs Explanation: Let father's age be x year and son's age be y year. According to question, 2(x+y) = 8y _______(I) and (x+y)/2 = 30 => x+y = 60 years__________(II) From equation (I) and (II) 8 y = 120 y = 15 years, Hence x = 45 years.

Q:

The average of eleven numbers is 68. The average of the first numbers is 78 and that of the next four number is 63. The 9th number is two time the 11th number and the 10th number is 4 less than the 11th number. What is the average of the 9th and 11th numbers?

1804 0

  • 1
    70.1
    Correct
    Wrong
  • 2
    70.5
    Correct
    Wrong
  • 3
    72.6
    Correct
    Wrong
  • 4
    72.2
    Correct
    Wrong
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Answer : 2. "70.5"

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? 1800 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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Q:

What is the average of the following numbers?
38, 92, 45, 25, 60

1782 0

  • 1
    48
    Correct
    Wrong
  • 2
    54
    Correct
    Wrong
  • 3
    56
    Correct
    Wrong
  • 4
    50
    Correct
    Wrong
  • 5
    None of these
    Correct
    Wrong
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Answer : 5. "None of these"

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