R

Ruchi Sharma • 9.84K Points
Tutor III Math 

Q. 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 ?

  • (A) 25 year
  • (B) 30 year
  • (C) 35 year
  • (D) 40 year
Correct Answer - Option(C)
Explanation by: Ruchi Sharma 
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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