Question

The average age of20 boys 40.ine boy 35 years old leave the class and another boy joined. The average decreased by 1. Find the age of new boy?

Answer 1

Step-by-step explanation:

Average age of 20 boys = 40

So obviously total = 20 x 40 = 800

When one boy leave and another one join, the average decrease by 1 i.e. 40 - 1 = 39

Age of new boy =?

Total = 39 x 20 = 780

Age of new boy will be 780/ 20 = 39