# One Teacher Retires and in Place of him a New Teacher 25 years Old joins :

Out of 10 teachers of a school, one teacher retires and in place of him a new teacher 25 years old joins. As a result of it average age of the teachers reduces by 3 years. Age of the retired teacher (in years) is:

- 56
- 55
- 60
- 58

**Answer: (2) 55**

**Explanation:-**The total numbers of teachers of a school = 10

One teacher retires and in place of him a new teacher 25 years old joins.

Then, the average age of teachers reduces by 3 years.

Therefore, the age of retired teacher = 25 + 3 x 10

= 25 + 30

= 55 years

Hence, the answer is (2) 55.