###Human: The class plans to take a field trip to the zoo. The cost to rent a school bus is $100. The cost of admission is $10 per student. The teacher is allowed in for free. If the class has a budget of $350, how many students can go on the field trip?, ### Assistant: There is $350 - $100 = $250 available to pay for the students' admission fees.
This means they can afford to bring $250 / $10 = 25 students on the trip. 
 So the answer is :  25