Question

24. The average age of 9 boys in a class is 15 years. If another boy of age 13 years joins the class, what is the average of the 10 boys?

Answer 1

It’s 14.8 years explanation is confusing I’m really bad at explaining!!!

Answer 2

14.8 years

Explanation:

Average age = total age / number of boys

Average age of ten boys = total age for 10 boys/ 10

Average age of 9 boys (15) = total age for 9 boys/ 9

total age for 9 boys = 9 * 15 = 135

total age for 10 boys = total age for 9 boys + 13 = 135+13 = 148

Average age of ten boys = 148/ 10 = 14.8 years