So what's the probability of there being no line, a one person line, or a two person line when you visit at 4 p.m. on a school day? Well, all you can do is estimate the true probability, the true theoretical probability. We don't know what that is, but you've done 50 observations here, right? This is, and notice this adds up to 50. 18 plus eight is 26, 26 plus 24 is 50. So you've done 50 observations here, and so you can figure out, well, what are the relative frequencies of having zero people? What is the relative frequency of one person, or the relative frequency of two people in line?