The indoor climbing gym is a popular field trip destination. this year the senior class at high school a and the senior class at high school b both planned trips there. the senior class at high school a rented and filled 3 vans and 4 buses with 262 students. high school b rented and filled 11 vans and 1 bus with 250 students. each van and each bus carried the same number of students. find the number of students in each van and in each bus.