Question 943829

let the maximum number of students be {{{x}}}

The cost of the  ski trip is equal to the sum of the cost tickets and the cost of the bus: for  {{{x}}} students, the cost of the tickets will be {{{25x}}}

 {{{800=25x+350}}}

{{{800-350=25x}}}

{{{450=25x}}}

{{{x=450/25}}}

{{{x=18}}}

so, answer is: c) {{{18}}} students