Answer: 24 students
Explanation:
We know that there were 129 students total. However, of those 129 students, 9 traveled in cars, which means that only 120 students took the bus. We know there were five buses, so if the students filled the buses up equally, we can divide the number of bus riders by the number of buses to find the number of students per bus.
With 120 students and 5 buses, we get 120 ÷ 5 = 24.