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If that were the case, we'd have a 55% drop out/flunk out rate, and that's not the case. I'm sure someone in the more science type field can give you info on certain classes, and I know this is one of sakky's favorite topics, but I can tell you that most of you are freaking out over nothing.
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<p>Well, I wouldn't say that 55% drop out or flunk out of the school entirely.</p>
<p>However, anecdotally speaking, it is definitely true that well over half of people who start out in certain majors, especially engineering, will not actually complete the major. Many leave because they find that the weeder classes are just too hard and so they drop the class, and since those weeders tend to be gateway classes to later classes in the major, dropping the class ultimately means dropping the major. And others stay in the weeder and get grades that are bad enough to prevent them from continuing. </p>
<p>I'll give you a topical example. Take ChemE 140, a notorious weeder. You need a C- in ChemE140 to proceed to other classes in Chemical Engineering, and the Chemical Engineering department will actually check people who register in later classes to see whether they got such a grade, and if they didn't, they will get de-registered. However, even if you got a C-, you may personally feel that you probably shouldn't continue, even though you are allowed to, for the simple reason that you still have several more weeders to go (ChemE141 is another weeder), and you've probably had enough. In fact, I would say that's true of most people who got less than a B-. They could continue, but they don't want to. And then of course there are those people who take ChemE140 and can see that they are going to get a bad grade, so they drop the class and henceforth switch to some other major (i.e. Chemistry). </p>
<p>So, while I don't know about the 45% success rate, I would not be surprised if that was the right figure, as long as we carefully define what 'success' means. Success doesn't just mean getting the minimum passing grade to continue. Success is the 'intersection' (to use set theory terminology) or your being allowed to continue and your wanting to continue. A lot of people who get grades that are technically good enough to continue nevertheless decide that they don't want to. Let's face it. A C might allow you to continue, but it's still not a very good grade. And a lot of people in the weeder classes end up with C's.</p>