Grading and Kidney Stones

My professor’s email: “The scores for Exam #1 are now posted online. The graded exams and a set of answers will be passed out in class tomorrow. The scores were quite good. The high was 103 and the average was 72.”

At reading that, high school me would’ve immediately passed two kidney stones. As is, I’m still a little shocked. I’m not used to the grading scale in this class- eighty through one hundred is an A, seventy through eighty is a B, and so on. You pass with just fifty percent. It’s bizarre. That hardly demonstrates any sort of passing mastery of the material.