<p>
[quote]
For L&S, one must take 6 units out of his/her major department, but those have to be upper-div units, and I doubt those upper-div classes will have 100+ students.
[/quote]
That would actually confirm what I said. To get to the level required to be allowed into upper-division classes, you have to take a lot of lower division classes (presumably large) creating the numbers that I mentioned.</p>
<p>Look, I'll approach the Berkeley data another war. There are 226 classes at Berkeley in Fall term with 100+ students (and probably a similar number in the Spring). Let's assume 200 students average in each of these classes (which probably works, as a some of these classes are really huge. Look at the intro-bio sequence, I'm guessing it has a massive number - at UCI, where my mom teaches, it's something like 1000).
That means, in any given term, 45,200 students are in classes with more than 100 students. That works out to 1.89 classes with over 100 students for every single undergrad (there are 23,863 total). That's about 40% of one's classes (if not more). If we assumed 150 students per 100+ class (though I'm almost certain this is too low) it still works out to 33,900 students in 100+ classes, or 1.42 per student. For a student taking 4.5 courses per term (alternating 4 and 5, which sounds like a reasonable number) this works out to 32% of one's classes.</p>