Question

the average age of 10 boys in a class is 6 years. The sum of the ages of 9 of them is 52 years. find the age of the 10th student​

Answer 1

The answer to the question is :

Answer 2

The age of the $10^{th}$ student​ is 8 years

Step-by-step explanation:

• Given data

        Number of student (N) = 10 boys

        Average age of 10 boys = 6 years

• Total sum of age of 10 boys =Number of student×Average age

        So

        Total sum of age of 10 boys = 10×6 = 60 years

• Here it is given that sum of the ages of 9 student of them is 52 years.

• We can write this

Sum of ages of 9 student + Age of 10th student =Total sum of age of 10 boys

        52 + Age of 10th student = 60

        Age of 10th student = 60- 52 = 8 years