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A school has "20" teachers,one of them r...

A school has `"20"` teachers,one of them retires at the age of `60`years and a new teacher replaces in this change reduces the average age of the staff'by `2` years,the age of new teacher is

A

28 years

B

25 years

C

20 years

D

18 years

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The correct Answer is:
C
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The mean age of 25 teachers in a school is 40 years। A teacher retires at the age of 60 years and a new teacher is appointed in his place। If the mean age of the teachers in this school now is 39 years, then the age (in years) of the newly appointed teacher is_______ .

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Out of 10 teachers of a school, one teacher retires and in place of him a new teacher 25 years old joins. As a result of it average age of the teachers reduces by 3 years. Age of the retired teacher (in years) is: (a) 55 (b) 60 (c) 58 (d) 56

There are 25 teacher in a school , the average age of teacher is 40. If a teacher of 60 years of age is retired than a new teacher is appointed in place of him and the average decreases to 39 . find the age of teacher appointed

MCGROW HILL PUBLICATION-STATISTICS -MULTIPLE CHOICE QUESTIONS
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