3 years ago the average of a family of 5 members…

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3 years ago the average 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:

  1. A. 1 years
  2. B. $$\frac{3}{2}$$ years
  3. C. 2 years
  4. D. 3 years

Answer: Option C

Here is complete explanation of 3 years ago the average of a family of 5 members….

Solution(By ExamCraze Team)

Let age of the baby is x. 3 years ago total age of the family = 5 × 17 = 85 years Total age of the 5 member at present time = 85 + 3 × 5 = 100 years Total age of the family at present time including baby, = 100 + X The average of the family including baby at present time, = 17 years $$frac{{100 + {text{x}}}}{6} = 17$$ 100 + X = 102 X = 102 - 100 = 2 years

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