The average age of 38 students in a group is 14 years. When teacherâ€™s age is included to it, the average increases by one. What is the teacherâ€™s age in years? Choose one:
A) 31
B) 36
C) 53
D) 58
E) None
Sol.   Age of the teacher = ( 39 Ã— 15 â€“ 38 Ã— 14 ) years = 53 years.   Answer 53
<result>C</result>
The average age of 38 students in a group is 14 years. When teacherâ€™s age is included to it, the average increases by one. What is the teacherâ€™s age in years?