Question

The average age of a group of 10 students is 15
years. When 5 more students join the group, the
average age increase by 1 year. The average age of
the new students is?
A) 15
B) 10
C) 20
D) 5​

Answer 1

Answer:

The average age of a group of 10 students is 15 years. When 5 more students join the group, the average age increase by 1 year. The average age of the new student is? Average age of 5 new students = 90/5 = 18 years.