Question

Three years ago, the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is the same today. The present age of the baby is

A) 2 years B) 2.4 years C) 3 years D) 1.5 years

Answer 1

Answer:

Correct Answer:

C) 2 years

According to the question

Average age of a family of 5 members 3 year ago = 17 years

sum of ages of a family members = \( \Large 5 \times 17 \) = 85 years

A baby having been born the average age of the family is same today.

Sum of age of a family of 6 members = \( \Large 17 \times 6 \) = 102 years

sum of age of a family of 5 members at present = \( \Large 85 + 5 \times 3 = 85 + 15 \) = 100 years

Age of Child = 102 - 100 = 2 years

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