The average age of 24 students and the class teacher is 16 years. If the class teacher’s age is excluded, the average reduces by one year. What is the age of the class teacher?  Choose the most appropriate option:
A) 50 years
B) 45 years
C) 40 years
D) Data inadequate
E) Data inadequate
Age of the CT = 25 × 16 – 24 × 15 = 400 – 360 = 40 yrs.   Answer 40 years
<result>C</result>
The average age of 24 students and the class teacher is 16 years. If the class teacher’s age is excluded, the average reduces by one year. What is the age of the class teacher?