When students are reviewing their "Class Grades" in EMSTesting or Platinum Tests, the program will display the type of grading method that your class is using. You will see one of two options: "Raw Score Grading" or "Cut Score Grading."
Raw Scores are often the more familiar option. They are a straight percentage of the number of questions answered correctly. A 9 out of 10 would get you a score of 90%.
Cut Scores are a bit more complex because they are taking in to account the difficulty of the items on the test.
For example, if your instructor assigns a test comprised of only hard questions, thereby creating a very difficult test, it would mean you would have to answer fewer questions correctly to achieve a passing score than if they were using Raw Score Grading.
If your instructor selects only easy questions, thereby creating a very easy test, you will have to answer more questions correctly to achieve a passing score than if they were using Raw Score Grading.
If you have questions about how the cut score of a question is determined, try this article here.
If you still have questions about your grades, your best course of action would be to contact your instructor.