Question

The the average age of 35 student is 14 year ifthe teacher is included the average is increased by 1 year find the age of teacher

Answer 1

sum of the ages of 35 students = x
then average of the ages of students = x/35
so , x/35 = 14
x = 14×34
x = 490
let teachers age be y then
(490 + y)/36 = 15
490 +y = 15 ×36
490 + y = 540
y = 50
so teacher's age is 50 years.



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