The average age of 20 boys in a class is 12 years. 5 new boys are admitted to th

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The average age of 20 boys in a class is 12 years. 5 new boys are admitted to the class whose average age is 7 years. The average age of all the boys in the class becomes:

Options:

A . 8.2 years

B . 9.5 years

C . 12.5 years

D . 11 years

Answer: Option D

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