You're not the only one. I'm not bad at math and logic, but very rusty, and almost completely uneducated when it comes to probabilities. (Oddly enough, the junior high school I went to did offer a probabilities course - to the students who were in the track below me. We who tested highest were given trigonometry a year earlier, instead.)

You might be right about the divide, too - I'm more in the former category than the latter, for all that I'm a programmer, and it doesn't seem like I'd have much opportunity to use the math even if I took the time to learn it, so there's very little motivation for me to do so.