Question

A class of 300 students went on a field trip. They took 15 vehicles, some vans, and buses. What is

the number of buses they took if each van holds 10 students and each bus holds 25 students?

Answer 1

Answer: 10 buses

Explanation:

This problem can be used using a system of two equations since there are two variables:

v + b = 15

10v + 25b = 300

solve for b and substitute into the second equation:

b = 15 - v

10v + 25 (15 - v) = 300

10v + 375 -25v = 300

-15v = -75

v = 5

b = 15 - v = 15 - 5 = 10