Final answer:
A van can carry 372 students and a bus can carry 65 students.
Step-by-step explanation:
To find how many students a van can carry, we need to divide the total number of students by the total number of vans. For South Campus, they rented 1 van and 6 buses with a total of 372 students. So, a van can carry 372/1 = 372 students.
To find how many students a bus can carry, we need to divide the total number of students by the total number of buses. For East Campus, they rented 4 vans and 12 buses with a total of 780 students. So, a bus can carry 780/12 = 65 students.