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Aptitude question and answer on Average
Question : After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the ages of the replaced and the new member ?
A. 15 years
B. 10 years
C. 6 years
D. 3 years
Answer : A. 15 years
Age decreased =(5 X 3) Years = 15 years.
So, The required difference = 15 years.