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Q 2483701647.     After replacing an old member by a new member, it was found that the average age of four members of a family is the
same as it was 3 year ago. What is the difference between the ages of the replaced and the new member ?
RRB-CLERK 2016 Mains 2001
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)