Question

The mean age of 25 students in a Jassis 12. If the teacher's age is induded, the mean age increases by I. The
teacher's age (in years) is
​

Answer 1

Answer:

ok

Step-by-step explanation:

i try do to thisok

hm hm ok

Answer 2

Answer:

38

Step-by-step explanation:

Sum of 25 students ages be x

⇒ Mean =

25

x

=12⇒x=300 equation - (1)

Let the teacher's age be y

⇒ New mean =

26

x+y

=13

⇒300+y=338

⇒y=38

Teacher's age =y=38