Question

The mean age of 25 students in class is 12. If the teacher age is included, the mean age increased by 1. The teacher age (in years)is

Answer 1

Answer is 25
Explanation :
NYC

Answer 2

Answer:

Age of teacher is 38

Step-by-step explanation:

Let the teacher's age be x

sum of ages of students= 12×25

=300

Mean of ages including teacher=13

300+x/26=13

300+x=13×26

300+x=338

x=338-300

x=38

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