Problema Solution
Ninety-six persons rode in buses to an elementary school picnic. there were 5 times as many parents as bus drivers. The number of boys was 3 times the number of parents and there were 12 fewer girls than boys. How many bus drivers were there.
Answer provided by our tutors
let 'x' represent the number of bus drivers, then '5x' represents the number of parents, '15x' represents the number of box and '15x-12' represents the number of girls
96 = x + 5x + 15x + 15x-12
solving for 'x' we have x=3
there were 3 bus drivers