What is the mean in an standard exam? (For grading on a curve)
“Grading on a curve” means that you select what percentage of grades you want to correspond to a given final grade. It’s entirely up to you how you choose the resulting mean grade using that system. If you want to make the mean a 60 or an 80 or anything else, that’s your call. Ultimately, though, the point of the curve is to avoid having “grades less than 50 are failing.”