The average age of 20 boys in a class is 12 years. 5 new boys join the class, whose average age is…

Average age of 17 student of a class is 16 years. If a new student join the class then average age becomes 20. Then find the age of new student.

The average age of the boys in a class is 16 years and that of the girls is 15 years.The average age for the whole class is (a) 15 years (b) 15.5 years ( c) 16 years (d) Cannot be computed with the given information

The average age of 30 boys in a class is 15 years. One boy aged 20 years, left the class, but two new boys came in his place whose ages differ by 5 years. If the average age of all the boys now in the class still remains 15 years, the age of the younger newcomer is:

The average age of 30 boys in a class is 15 years. One boy, aged 20 years, left the class, but two new boys came in this place whose age differ by 5 years. If the average age of all boys now in the class becomes 15 years, the age of the younger newcomer is :

The average age of 30 boys in a class is 15 years. If we include the age of two teachers the average age increases by 1. Find the sum of ages of the two teachers.