Correct Answer - Option 2 : 24.5 years

**Given:**

Average age of 7 people = 24 years

Age of youngest member = 3 years

**Formula used:**

Average = sum of observations/total number of observations

**Calculation:**

Total age of 7 members = 24 × 7 = 168 years

Total age 3 years ago = 168 - (7 × 3) = 147 years

The number of members at that time was 6

So, average age = 147/6 = 24.5 years

**∴ The average age was 24.5 years**