@VeryLuckyParent, well, apparently, not all class sections are capped (to a number under 50) if even at UChicago, 6% of classes are >50 in size.
And considering that people have already worked out the math for you, I fail to see why it’s hard for you to believe that there are some students who have half their classes in ones with >50 students even at schools where only 10% of classes are >50.
And @Pizzagirl was talking about a very related (essentially the same) subject.