Question

25 student's average age is 17 years. if in which add the teachers age than in average year one year increasing so which will age of teacher

Answer 1

Average age of 25 students=17 year

If we add the age of teacher in average of students age it increases the average by 1

This is given we have two way to solve it

1)
After adding the age of teachers the average increased by 1 so it means
Every student take a shear of age
total student =25

Total shear of age divided in students=25yr
And age of 26 person become (teacher 18)

Age of teacher =25+18=43

2) way

26x18=468

25x17=425

Age of teacher=468-425=43

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