Are you also assuming that you know all of those assumed facts about the area?
I would certainly expect that how many resources I want to spend on exploration will be affected by how much a priori knowledge I have about the system. Without such knowledge, the amount of exploration-energy I'd have to expend to be confident that there are two regions A and B with average payout as you describe is enormous.
This is for anyone in the LessWrong community who has made at least some effort to read the sequences and follow along, but is still confused on some point, and is perhaps feeling a bit embarrassed. Here, newbies and not-so-newbies are free to ask very basic but still relevant questions with the understanding that the answers are probably somewhere in the sequences. Similarly, LessWrong tends to presume a rather high threshold for understanding science and technology. Relevant questions in those areas are welcome as well. Anyone who chooses to respond should respectfully guide the questioner to a helpful resource, and questioners should be appropriately grateful. Good faith should be presumed on both sides, unless and until it is shown to be absent. If a questioner is not sure whether a question is relevant, ask it, and also ask if it's relevant.