How Young Is The New Member As Compared To The Old One?
Crack this riddle!!
A society had 10 members.
A new member replaced an elderly member recently.
After which the average age of these members is the same as it was 4 years ago.
How young is the new member as compared to the old one?
So were you able to solve the riddle? Leave your answers in the comment section below.
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Answer:
Let the sum of nine member (total) = x
and the age of old one = z
so its average 4 yrs before = (x+z)
10
After 4 yrs let z be replaced by y.
so now avg = (x+4*10+y)
10
As the averages are equal we can write
(x+z)/10=(x+40+y)/10
So after solving it found
z=y+40.
so old person is 40yrs older than young one.