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

A. 1 year
B. 3 years
C. 2 years
D. 4 years
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সঠিক উত্তরঃ C. 2 years
Explanation: