yellowstone national park is a popular field trip destination. this year senior class at high school A and senior class at high school B both planned trips there. the senior class at high school A rented and filled 7 vans and 10 buses with 332 students. high school B rented and filled 4 vans and 15 buses with 459 students. each van and each bus carried the same number of students. find the number of students in each van and in each bus