What is the Age of Mother? If

The average age of 4 brothers is 12 years. If the age of their mother is also included, the average is increased by 5 years. The age of the mother is

  1. 37 yrs.
  2. 43 yrs.
  3. 48 yrs.
  4. 53 yrs.
Monis Rasool Professor Asked on 25th May 2015 in Maths.
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  • 1 Answer(s)

    Answer: 37 years.
    Explanation:-
    The average of ages of the four brothers = 12 years
    Total age of the four brothers = 12 x 4 = 48 years

    Let the age of their mother be = X years

    If the mother’s age included then, average increased by 5 years
    Therefore,         48 + X = (12 + 5) x 5
    48 + X = 85
    X = 85 – 48 = 37

    Hence, the age of the mother is 37 years.

    Anurag Mishra Professor Answered on 25th May 2015.
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