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:
A. 1 years
B. $$\frac{3}{2}$$ years
C. 2 years
D. 3 years
Answer: Option C
Solution(By Examveda 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 yearsJoin The Discussion
Comments ( 2 )
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Not a correct answer it was wrongful .Our text book was 1 is the correct answer
thank you