Multiple choice

Average of 40 student of a class is 15 years. If the average age of the class including the teacher is 16 years then the age of the teacher would be-

  1. 46

  2. 52

  3. 56

  4. 48
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total age of 40 students = 40 × 15 = 600 years. Total age of 41 people (40 students + teacher) = 41 × 16 = 656 years. Teacher's age = 656 - 600 = 56 years. This is a standard average problem where the teacher's age raises the overall average.

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