Question

54. The average of 65 students in a class is 9 years. If the average age of all students with their
class teacher is 9.5 years. Then what is the age of the class teacher.
1) 41.5 years
4) 42.5 years
2) 43 years
3) 42 years​

Answer 1

Answer:

the age of the class teacher is 42.5 years