I saw a page once that was something like "7 Statistics Rules of Thumb for Programmers" that included some neat stats like * To get N trading cards which each

I saw a page once that was something like "7 Statistics Rules of Thumb for Programmers" that included some neat stats like * To get N trading cards which each have 1/N probability, buy something like either 2.7N or 3N cards Can never find it though.