The average age of 12 students is 20 years. If the age of the teacher is included, the average increases by 1 year. What is the age of the teacher? MCQ with Answer and Explanation

Question

The average age of 12 students is 20 years. If the age of the teacher is included, the average increases by 1 year. What is the age of the teacher?

A. 31

B. 33

C. 34

D. 32

Answer: Option B

Solution (By JKSSB Mock Tests)

Total age of students = 12 × 20 = 240. New average = 21. Total age of 13 people = 13 × 21 = 273. Teacher's age = 273 - 240 = 33 years.

This question belongs to: Maths Average

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