In a class there were 10 students. 4 students left the class and 6 new students joined the class thus the average age of the class got decreased by 1.5 years and the total age of all the students in the class got increased by 9 years then find the new average age of the class?
- 12 years
- 12.5 years
- 11.5 years
- 13 years
Answer
Option 1 : 12 years
In a class there are 10 students
