Question

The average age of class of 30 students is 14 years. If the teacher's age is also included the average age increases by 1 year. Find the teacher's age.

Answer 1

Firstly age of whole class = 30×14
=420years
After teacher added
Total age = (30+1)×(14+1)
=31×14
=434years
Teacher age=434-420
= 14 years

Answer 2

HEY Buddy.....!! here is ur answer

Given that : The number of students in the class = 30, and average of their ages = 14 years.

Then, total of their ages = 30×14 = 420

After the age including of the teacher the average age increased 1 year then the average age = 15 years.

And Total number of members = 31

Then, total of their ages = 31×15 = 465

Therefore, the age of teacher = 465–420 = 45 year.

I hope it will be helpful for you....!!

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