Question

100 students are boarding the hogwarts express! they all have allocated seats but the 1st wizard to board sits in the wrong seat. each student then gets onto the train and takes their allocated seat if it’s available. if not, they pick a seat at random. what is the percent chance the last passenger will get his seat

Answer 1

It would be 50%, because they have a 50/50 chance of getting their seat, even if the first wizard/witch got in the wrong seat.