Question

After the oldest member of a club was replaced by a new member, it was found that the average age of seven members of the club is the same as it was 3 years ago. What is the difference between the ages of the oldest and the new member?

• A. 15
• B. 20
• C. 25
• D. None of these

Answer 1

The correct option is D

None of these

Age decrease = (7$\times$3) years = 21 years.

So, the required difference = 21 years.