Correct Answer - Option 2 : 2 years
Given
The average age of Raju's family 3 years ago = 14 years
Formula Used
Average = sum of observation/No. of observation
Calculation
Let the age of his daughter is X years.
Three years ago, sum of ages of all four family members = 14 × 4 = 56 years
Today the total age of the 4 members of the family is
⇒ 56 + (4 × 3) = 68 years
A girl having been born, the average of the family is same today 14yr
⇒ 14 = (68 + X)/5
⇒ 68 + X = 70
⇒ X = 2
∴ The age of his daughter is 2 years.