Correct Answer - Option 1 : 1
Given
Average age of husband and wife 5 years ago = 23 years
Formula Used
Average = Sum of data/No. of data
Calculation
Let the age of Husband, Wife and Child be H, W and C
According to Question
H - 5 + W - 5 = 23 × 2 = 46
⇒ H + W = 56
Sum of Husband, Wife and Child age at present = 19 × 3 = 57
⇒ H + W + C = 57
⇒ C = 1 years
∴ The age of child is 1 years