Question

class, the average age of 41 students is 13.5 years. If the age of the class
acher is added to the total ages of the students, then the average age increases
6 months. Find the age of the class teacher.
(2019) Da
3 years 6 months
55 years 6 months
(2) 34 years 6 months
(4) 36 years 6 months​

Answer 1

(sum of all ages )/ ( no of students)= average value

X= sum of ages of all students

Y= age of teacher

X/30=9 or X=270

(X+y)/31=10 or X+y=310

Or age of teacher= 310–270=40

mark as brilliant answer plz

Answer 2

Step-by-step explanation:

( sum of all ages )/(no.of student ) over value

x= sum of ages of all student

y= ages of teacher

x/30 =9 or x = 270

(x+y)/31 =10 or x+y = 310

or age of teacher = 310-270=40