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Average age of a group of 10 children is...

Average age of a group of 10 children is 12 years. If a child leaves the group, then the average of remaining 9 children becomes 11 years. What is the age (in years) of the child who left the group?

A

20

B

21

C

22

D

19

Text Solution

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The correct Answer is:
A, B
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