Question

tha average age of 24 students and the class teacher is 16 years . if the age of class teacher is excluded, the average age reduces by 1 year. the age of class teacher (in years) is

Answer 1

Sum total of ages of 24 students + class teacher = 25 * 16 = 400 years

average age of 24 students = 16 -1 = 15 years
sum total of ages of 24 students = 24 * 15 = 360 yrs

Age of the class teacher =  400 - 360 -40 years