So if u come 10th in an subject you get the 10th Mark right
So A student gets 38% in an exam rank 8/15
B student gets 28% in exam rank 10/15 so does that mean the 10 guy gets 28%?
If you come 10th in a subject, it means you receive the 10th highest internal moderated mark. BOS is unaware of the difficulty of your school examinations so they use the HSC exams that your cohort for a particular subjects sits, and moderates the internal marks.
For example
Your school for english decides to make extremely hard exams or set harsh marking guidelines and you along with your cohort receive poor marks.
You guys sit the HSC exams and woah there is a massive difference between the marks you received internally as opposed to the actual HSC exam, where everyone received higher marks. What does this tell BOS?
That you guys had hard exams in comparison to the HSC and thus they moderate your internal marks to match the difficulty of the HSC exam and to create fairness across the state.
Then, once these marks have been moderated, your rank determines which mark you receive. If you are ranked 10th, then you will receive the 10th highest moderated internal mark.