The average age of a class of 30 children is 12. The average age of the children increased by 1 when the class teacher's age was added. How old is your teacher?
Answers
Answered by
0
Answer:
AGE OF TEACHER =30
Step-by-step explanation:
Here,
Sum of age of students = 12*30
= 360
let the age of teacher be x
now , According to Question,
(360+x)/30= 13
=>360+x = 390
=>x =30
Answered by
0
Answer:
Step-by-step explanation:
Similar questions