1 . 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 old and the new member ?

• A. 15 year
• B. 8 year
• C. 4 year
• D. 2 year
• D. None of them

Answer: Option A

Explanation: