Lets say your first in your class with a mark of about 85 but in the hsc you get like 75 and no one else in your class beats you, will your internal mark fall to 75 too?
Yeah I think so. You will get the 'top exam mark' from your school as your assessment mark, so if the best persion gets 75, and you're ranked 1st, that will be your assessment mark. (and your exam mark if you're the one who scores it)