# What will the Age of Teacher?

The average age of 24 boys and their teacher is 15 years. When the teacher’s age is excluded, the average age decreases by 1 year. The age of teacher is-

- 38 years
- 39 years
- 40 years
- 41 years

*Answer: (1) 38 years*

*The av*erage of 24 boys and their teacher = 15 years

Total age 24 boys and teacher = 24 x 15 = 360 years

When, teacher is excluded then remains boy = 24 – 1 = 23 boys

And the average decreases by 1 year

New average = 15 – 1 = 14

Total age of 23 boys = 23 x 14 = 322 years

The age of teacher = 360 – 322 = **38 years Ans.**

Hence, the age of teacher is **38 years.**