Latest bank Aptitude Question SOLUTION: . The average age of 5 member of an interview board is the same as it was 2 years ago, because an old member has been replaced by a new member. The difference between the ages o

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(#M40038044) BANK Numerical Ability question Average Keep an EYE

. The average age of 5 member of an interview board is
the same as it was 2 years ago, because an old member
has been replaced by a new member. The difference
between the ages of old and new member is

Asked In bank kriti (9 years ago)

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SUDHIR SHARMA  (9 years ago)

let AV be the average and A1,A2,A3,A4,A5 be the age of 5 members.
Then , AV = A1+A2+A3+A4+A5 / 5 ......(1) ............ 2 years before

and AV = A1+2 + A2+2 + A3+2 + A4+2 + A5' / 5 ..........(2)....2 years later

from (1) and (2) , we have

A5 = A5' + 8
or A5-A5' = 8

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