Two years ago the average age of a family of 8 members was 18 years. After the a

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Two years ago the average age of a family of 8 members was 18 years. After the addition of a baby, the average age of the family is same today. What is the age of the baby ?

Options:

A . 1$1/2$ years

B . 2 years

C . 2 $1/2$ years

D . 1 year

Answer: Option B
Answer: (b)Sum of present ages of 9 member family = 18 × 9 = 162 years Sum of 8 member’s present ages = 18 × 8 + 2 × 8 = 144 + 16 = 160 years Child’s age = 162 – 160 = 2 years

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