This has bugged me for quite some time now, but I've always shrugged it off. I've taken a course in statistics and have dealt with them in one way or another for a few years, so I KNOW I've seen the answer to this, but I can't remember it and don't know where to look for it. Well, I could crack open my statistics book, but I figure this would go faster. Anyway, my question is as follows: The probability of something happening is 1/100. You do 100 iterations. What is the chance of it happening? So for example you have a 100 sided die, and you roll it 100 times. What's the chance of getting a 9? I know I can't be 1. But it has to get closer as you get to infinity, right? I just can't think off the top of my head how that formulation would go.