According to the given information, Average age of father and son is 22 years. Ratio of their ages = 10 : 1 Finding the age of the son by verifying options, Option 1 → 24 years Then father’s age is 240 Average = 240 + 24/2 = 264/ 2, which is not correct Option 2 → 4 years Then father’s age is 40 Average = 40 + 4/2 = 44/ 2 = 22, which is correct Option 3 → 40 years Then father’s age is 400 Average = 400 + 40 /2 = 440/ 2, which is not correct Option 4 → 6 years Then father’s age is 60 Average = 60 + 6 /2 = 66/ 2 = 33, which is not correct Hence, option 2 is the correct answer.