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Questions  >>  Olympiad-Math  >>  Class 6  >>  Math  >>  Percentages
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Q)

The average age of 25 students in a class is 12 years. 15 students whose average age is 10 years joined them. What is the present average age.


( A ) 11
( B ) 11.25
( C ) 12.6
( D ) 12

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