After replacing an old member by a new member, it was found that the average age of five numbers 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?
Choose the correct choice from the following answers
A) 2 years
B) 4 years
C) 8 years
D) 15 years
E) NOne
Sol.   Age decrease = (5 × 3) years = 15 years.   So, the required difference = 15 years.   Answer 15 years
<result>D</result>
After replacing an old member by a new member, it was found that the average age of five numbers 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?