Answer:
They bought the orange book
Step-by-step explanation:
The easiest way to figure this problem out would be to break it down so it seems more simple.
6 students, 18 items, each paid $24.
8*18 = 144
144/6 = $24
You would just multiply the cost of the red book, blue book, and orange book by the 18 items. Then divide your answer by the number of students.
