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  • Question
  • 8 years ago there were 5 members in the Arthur's family and then the average age of the family was 36 years. Mean while Arthur got married and gave birth to a child. Still the average age of his family is same now. What is the age of his wife at the time of his child's birth was.If the difference between the age of her child and herself was 26 years.


  • Options
  • A. 25 years
  • B. 26 years
  • C. 20 years
  • D. can't be determined

  • Correct Answer
  • 26 years 

    Explanation

    Since we know that the difference b/w the age of any two persons remains always constant, while the ratio of their ages gets changed as the time changes.

     

    so, if the age of his child be x (presently)

     

    Then the age of  wife be x + 26 (presently)

     

    Thus the total age = x + ( x + 26) = 32  [ ? 252-220 =32]

    => x = 3

    Therefore, The age of her child is 3 years and her self  is 29 years. Hence her age at the time of the birth of her child was 26 years.


  • Average problems


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    • 1. The average value of property of Mittal, Ambani and Singhania is Rs.11111 crore. The property of Singhania is as less than the property of Mittal is greater than the average property of both the Singhania and Mittal. The value of property of Ambani is :

    • Options
    • A. Rs.111 crore
    • B. Rs. 1111 crore
    • C. Rs. 11111 crore
    • D. can't be determined
    • Discuss
    • 2. Sriram was conducting an experiment in which the average of 11 observations came to be 92, while the average of first five observations was 89, and that of the last five was 86. What was the measure of the 6th observation ?

    • Options
    • A. 134
    • B. 137
    • C. 139
    • D. 141
    • Discuss
    • 3. The average monthly salary of 24 employees in an organisation is Rs. 1500. If the manager's salary is added, then the average salary increases by Rs. 400. What is the manager's monthly salary ?

    • Options
    • A. Rs. 8840
    • B. Rs. 11,500
    • C. Rs. 12,800
    • D. Rs. 9450
    • Discuss
    • 4. On a school?s Annual day sweets were to be equally distributed amongst 112 children. But on that particular day, 32 children were absent. Thus the remaining children got 6 extra sweets. How many sweets was each child originally supposed to get ?

    • Options
    • A. 14
    • B. 16
    • C. 12
    • D. 15
    • Discuss
    • 5. There are 44 students in a hostel, due to the administration, 15 new students has joined. The expense of the mess increase by Rs. 33 per day. While the average expenditure per head diminished by Rs. 3, what was the original expenditure of the mess ?

    • Options
    • A. Rs. 404
    • B. Rs. 514
    • C. Rs. 340
    • D. Rs. 616
    • Discuss
    • 6. 20 men went to a restaurant. Ninteen of them paid Rs.70 each and the twentieth man paid Rs.90.25 more than the average of all the 20 men. What is the total bill ?

    • Options
    • A. Rs. 1495
    • B. Rs. 548
    • C. Rs. 850
    • D. Rs. 1750
    • Discuss
    • 7. In a class of 100 students, the average weight is 30 kg. If the average weight of the girls is 24 kg and that of the boys is 32 kg, then what is the number of girls in the class?

    • Options
    • A. 25
    • B. 26
    • C. 27
    • D. 28
    • Discuss
    • 8. The average of the two-digit numbers, which remain the same when the dibits inter-change their positions, is :

    • Options
    • A. 53
    • B. 54
    • C. 55
    • D. 56
    • Discuss
    • 9. The average of 26,29,n,35 and 43 lies between 25 and 35. If n is always an integer and greater than the average of the given integers then the value of n is :

    • Options
    • A. 33
    • B. 34
    • C. 33
    • D. None of these
    • Discuss
    • 10. A batsman scores 26 runs and increases his average from 14 to 15. Find the runs to be made if he wants top increasing the average to 19 in the same match ?

    • Options
    • A. 74
    • B. 79
    • C. 72
    • D. 60
    • Discuss


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