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Find how much younger is the new member
The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member.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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superstardlx- Member Since Aug-2008 | Aug 27th, 2008
let the members be a1,b,c,d,e,f,g,h,i,j .Let a2 be the younger member who replaces a1.
we have,
a1+b+c+......+j=a2+b+4+c+4+d+4+.....+j+4
=> a1+b+c+....+j=a2+b+c+..+j+36
hence,the oldest member is 36 years older than the new memberibulal
- Jun 9th, 2010
On the inclusion of the new member in the committee, there is no change in the average age of the committee members as it was 4 years back implying:The newly substitute in the committee is a younger c...
jamesjac
- Feb 8th, 2010
Four years back, Let the sum of the Ages of the 9 members of the committee( Who still continues ) be M. Let the age of the 10th memeber at that time be R. Hence the average age of the 10 m...
