>>11827212It's a combinatorics problem. Consider the numbers 100-999 as bins, and the set of counties, cities, states (or any other municipality that would be reported on in a typical news cycle)the items to randomly distribute among the bins. If we just take the counties in the US alone (jewgle says 3,141) then I don't think it's too improbable that every bin would be occupied by at least one county.
The proper way to express the probability that at least each 3 digit value is occupied by at least one county is something I've been thinking about the past day since I saw this stupid shit on /pol/ yesterday night.
If you're trying to ask "what is the probability that every number shows up in a search?" you could formulate it as a sequence of values, M for counties/municipalities, N for numbers, and the question is "what is the probability of seeing one more more consecutive values of N?" If M is large compared to N then naturally the probability would be expected to go down.