The mean age of 29 students of a class is 11 years. If the age of their teacher is also included then the mean is increased by one year. What is the age of the teacher?

The mean age of 29 students of a class is 11 years. If the age of thei

1.	The mean age of 29 students of a class is 11 years. If the age of their teacher is also included then the mean is increased by one year. What is the age of the teacher?
A.	40 years
B.	51 years
C.	41 years
D.	55 years
Answer» D. 55 years

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The mean age of 29 students of a class is 11 years. If the age of their teacher is also included then the mean is increased by one year. What is the age of the teacher?

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