Question

the mean age of 25 students are 12 years . hidden features include the mean will increase by 1. find the teacher's age​

Answer 1

The mean age of 25 students is 12 years. i.e Teacher's age = 38 years. Answer: ... Hence, the age of the teacher = (338 - 300) years = 38 years.

Answer 2

ans

teacher's age 38 yrs

Step-by-step explanation:

$12 \times 25 = 300$

$13 \times 26 = 338$

$338 - 300 = 38$