What would be average age of only the students?

The average age of 33 students and class  teacher in a class is 15 years. If the class teacher’s age is 48 years. What would be average age of only the students?

  1. 13 years
  2. 12 years
  3. 14 years
  4. None of these
Anurag Mishra Professor Asked on 20th December 2015 in Maths.
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1 Answer(s)

Answer: (3) 14 years

Solution:-
The average of 33 students and class teacher in a class = 15 years
Therefore, the total age of all students and teacher in a class = 34 x 15
= 510 years

The teacher’s age = 48 years
Then total age of all students = 510 – 48
= 462 years

The average age of all students = 462/33
= 14 years

Then the average of only the students is 14 years.

Hence, the correct answer is option (3) 14 years.

Anurag Mishra Professor Answered on 20th December 2015.
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