The average age of 36 students in a group is 14 years. When teacher’s age is included to it, the average increases by one. What is the teacher’s age in years?  Choose the correct option: A) 31 B) 36 C) 41 D) 51 E) None
Sol.   Age of the teacher = ( 37 × 15 – 36 × 14 ) years = 51 years.   Answer 51
<result>D</result>
The average age of 36 students in a group is 14 years. When teacher’s age is included to it, the average increases by one. What is the teacher’s age in years?