What is the best solution if there are cases like the following: There is a competition at the school that requires each class to send 4 students. In class X, there are no students who are willing to take part in the competition. If a class does not send / send less than 4 students, the class will get a fine. The leader of class X doesn't want to get a fine. What can the class leader do to be able to send 4 students by trying to be as fair as possible to each student (especially the 4 students who will be selected)?
I know that rolling a die or having a vote would be a solution. But let's say that there is no one in the class that is superior to others about the subject that's being contested, and therefore, doing a vote would be unfair because there are no particular reason for someone to be voted.
So, is rolling a die would be the only solution?