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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The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member.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?


  
Total Answers and Comments: 2 Last Update: January 15, 2009     Asked by: vishin2 
  
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 Best Rated Answer
Submitted by: superstardlx
 
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 member

Above answer was rated as good by the following members:
agarwal_nishtha08, yatish.m.21
August 27, 2008 09:05:09   #1  
superstardlx Member Since: August 2008   Contribution: 2    

RE: Find how much younger is the new member
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 member

 
Is this answer useful? Yes | NoAnswer is useful 1   Answer is not useful 0Overall Rating: +1    
January 15, 2009 11:11:13   #2  
rathinamraj Member Since: January 2009   Contribution: 1    

RE: Find how much younger is the new member
Let 'O' be the old persons' age and 'N' be the new persons' age and 9X be the age of rest of 9 persons.
then (9X+N)/10 (9X+O-10*4) (10*4 > coz 4 yrs back for 10 persons)
> 9X+N 9X-40
>N -40 (which means the new person is 40 years younger than the old person).
and it solves the problem!!!

 
Is this answer useful? Yes | NoAnswer is useful 1   Answer is not useful 1Overall Rating: -N/A-    

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