The average age of 24 students in a class is 10. If the teacher's age is included, the average increase by one . The age of the teacher is?

25 year
30 year
35 year
40 year

Correct Answer: 35 year

Explanation:

Age of the teacher = Sum of age of 24 students and teacher - Sum of age of 24 students.
= 25 x 11 - 24 x 10
= 35 years.
∴ Age of teacher = 35 years.

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