Age Group Average Problem

The Age Group Average Problem is as follows :

Question :

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member.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 out how much younger is that new member ? :) 

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Solution :

Now to solve this sum, there are many complicated ways :) But Ill show you the simplest one :)

We know that since there are 10 members, after 4 yrs each of them gets 4 yrs older. Hence the group combined, has aged 40 yrs. Hence,
If the new member has to keep the average the same as 4 yrs ago, he should be 40 yrs younger than the member he is replacing 😉

Hence the answer is 40 yrs 


Got a doubt ? :) Leave me a comment and Ill get back to you :)

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