The average age of A, B and c is 17 years, If A is replaced by D the average age of the group increased to 2. so the age of D is ............

9th-class-result-2022

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The average age of A, B and c is 17 years, If A is replaced by D the average age of the group increased to 2. so the age of D is ............

Correct

None of these

Incorrect

21

Incorrect

20

Incorrect

19

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