Final answer:
A van can carry 18 students and a bus can carry 56 students.
Step-by-step explanation:
To find out how many students a van can carry, we need to divide the total number of students by the total number of vans. For high school A, there are 12 vans and 2 buses with a total of 222 students. So, the number of students a van can carry is 222 divided by 12, which equals 18 students.
To find out how many students a bus can carry, we need to divide the total number of students by the total number of buses. For high school B, there are 6 vans and 6 buses with a total of 336 students. So, the number of students a bus can carry is 336 divided by 6, which also equals 56 students.
Therefore, a van can carry 18 students and a bus can carry 56 students.