I think that's what the poster meant. The odds of getting given number don't change from spin to spin, but the odds of getting the same number twice in a row are much lower than getting it each individual instance. To simplify it for others (not you, since you clearly get it), upon flipping a coin a hundred times in a row and calling heads every time, the odds of it coming up heads on the hundreth flip are 50%. The odds of it coming up heads the first 99 times as well are much, much lower (approximately 1 in 6.3 × 10 to the 29th power.) She wasn't betting on it hitting black 20. She was betting on it hitting black 20 again. And, just to complicate things, the odds of her winning 2 times in a row but switching the number the second time are exactly the same. But that's counterintuitive...most people would assign better odds to the ball hitting two different numbers in consecutive spins than to it hitting the same number in consecutive spins. So does changing the number improve her odds? Yes and no. That's where things really get argumentative, heh, and people start nattering on about heuristics and the gambler's fallacy and the difference between statistical likelihood of two random events specifically occurring vs statistical likelihood of two specific events randomly occurring.
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