If the average age of four children is 12 years and the

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If the average age of four children is 12 years and the average age of these children and their father is 20 years, what is the age of the father ?

1. 52 years
2. 48 years
3. 62 years
4. 54 years

Correct Option: A

Here , The average age of four children = 12 years
Total age of 4 children = 4 × 12 = 48 years
The average age of four children and father = 20 years
Total age of 4 children and father = 20 × 5 = 100 years
&there; Father’s age = Total age of 4 children and father - Total age of 4 children
Hence , Father’s age = (100 – 48) years = 52 years