Question

The average age of 25 boys in a class decreases by 6 months when a new boy takes the place of a 20 yr old boy. Find the age of new boy​

Answer 1

Step-by-step explanation:

Average age of 9 children is 8 years 11 months. Now, we have to find the age of tenth child. °• Age of tenth child is 17 years 3 months.