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The average age of 20 boys in a class is...

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 the boys in the class becomes

A

8.2 years

B

9.5 years

C

12.5 years

D

11 years

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The correct Answer is:
D
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KIRAN PUBLICATION-AVERAGE-TYPE-VIII
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