I asked a question "How to use the born rule to find..." and it was closed for being a homework-like question. Now this was not a homework question. It's also not the case that I am lazy. I own multiple QM texts and have read through them trying to figure out how to solve these kinds of problems. I've also gone through physics grad school and I never learned how to solve these kinds of problems, which is surprising because of how simple they are. I suspect you do learn how to solve these kinds of problems if you go into certain fields like QM information. But in any case I think it is true that nowhere do typical QM texts cover how to answer these kinds particular kinds of problems. This feels like a very frustrating catch-22. Also, to make it even clearer that this was not a homework question, it was a follow-up to this question.
Can someone tell me how I can re-word the question? I thought I was being helpful by drawing a diagram and making a specific example that was complex enough to capture the salient points of how to solve these kinds of problems, but I realize that kind of specificity may make it look like a homework problem.