in a class, there are 20 boys whose average age is decreased by 2 months, when

Question

in a class, there are 20 boys whose average age is decreased by 2 months, when one boy aged 18 years is replaced by a new boy.find the age of new boy.

Options:

A . 11 years 10 months

B . 12 years 2 months

C . 13 years 6 months

D . 14 years 8 months

Answer: Option D
Explanation :

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