Correct Answer - Option 1 : 2
Given:
3 years ago average age of 5 members is 17 years.
Formula used:
Average = Sum of values/number of values
Calculation:
3 years ago average age of 5 members is 17 years
Sum of ages of 5 members, 3 years ago
⇒ 17 × 5 = 85
Average of Present age of 5 members = 20 years
Sum of present ages of 5 members = 20 × 5 = 100
But a baby born and average remains same i.e 17 years
Sum of present ages of 6 members = 17 × 6 = 102
Age of baby = 102 - 100 = 2 years
∴ The age of baby is 2 years.