The average age of 30 students is 9 years. If the age of their teacher is includ – OfficerPath

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MCQ Practice

The average age of 30 students is 9 years. If the age of their teacher is included, the average age becomes 10 years. The age of the teacher (in years) is :

Subject: MathematicsTopic: Average

A

27

B

31

C

35

D

40

Correct Answer: D

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