In a popular online role playing game, players can create detailed designs for their character's "costumes," or appearance. Carson sets up a website where players can buy and sell these costumes online. Information about the number of people who visited the website and the number of costumes purchased in a single day is listed below. 77 visitors purchased no costume. 161 visitors purchased exactly one costume. 5 visitors purchased more than one costume. Based on these results, express the probability that the next person will purchase no costume as a fraction in simplest form.