Latest Accenture Aptitude Question SOLUTION: The average age of 12 members of a committee is the same as it was 3 years ago, because an old member has been replaced by a young member. Find how much younger is the new member?

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The average age of 12 members of a committee is the same as it was 3 years ago, because an old member has been replaced by a young member. Find how much younger is the new member?
A)48 B)45 C)36 D)60

Asked In Accenture Devendra Marghade (4 years ago)

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Prasanna  (3 years ago)

Answer 36

Let the age of 11 mem be 11x and the old one be O, new one be Y.
Given
Present : avg= (11x +Y) /12
Before 3 years : avg = (11x+O - 12*3) /12
(Since it is before 3 years all the ages of 12 mem should be decremented by 3 )
Now ; avgs are same so equating above 2 equations gives
11x+Y= 11x + O -36
Y= O-36
Or
O - Y= 36

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