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The average age of a husband and his wife when they married 5 years ago was 23 years Now the average age of the husband, wife and his child who was born during this period is 19. What is the age of the child ?
1. 1
2. 2
3. 3
4. 4

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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 

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