<p>Taffy is on to something because there are a number of ways where that 5% of “100” level courses comes out to below 100 students even though you will likely see 2 or more courses in your first semester where the number is well over 100 students. Chemistry is a good example. Chem 102, a required course for science and engineering majors, usually has several hundred students. However, all those students also take the lab course that goes with it, Chem 103, and there can be 25 or more different lab sections with the result that the number of courses with 100 or more for that pair of Chem classes is less than 5%. The same happens for biology. Moreover, there are a lot 100 level courses that may not reach 100 but they will have well over 50. </p>
<p>A correction to mention is that quantum physics (Phys 214) actually usually has in the hundreds because it is a required course for most engineering majors. (It is also known as one of the weed-out courses for engineering since 35% or more usually get a D or F.)</p>