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From a class of 42 boys, a boy aged 10 years goes away and in his place, a new boy is admitted. If on account of this change, the average age of the boys in that class increases by 2 months, the age of the newcomer is :
- A. 19 years
- B. 17 years
- C. 10 years 6 months
- D. 12 years 2 months
Answer: Option B
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