Question

The
average of 20 students class is 21. If the age
9 teacher is included then average increase by
age of teacher
2year. Find age of teacher.​

Answer 1

Answer:

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the age of teacher is 21 then average remains unchanged but due to increase by 2yrs

it means teacher gave 2 yrs to everyone (20+1)=21

21+(21x2)

21+42=63 years

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Answer 2

Answer:

63 is the correct answer....

Explanation:

63 years is the age of teacher