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
Correct Answer: 15 year
Age decreased = (5 × 3) years = 15 years So, the required difference = 15 years