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 -

A. 55

B. 65

C. 45

D. 75

Answer: Option A

Solution(By Examveda Team)

Age of retired teacher
= 25 + (10 × 3)
= 25 + 30
= 55 years