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 ?
✅ Correct Answer: (C)
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.
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.
= 25 x 11 - 24 x 10
= 35 years.
∴ Age of teacher = 35 years.