So i was very confident in my chemistry exam, i did every past paper from 2001-2010, and consistently scoring 85+ raw. I was ranked second at my school, and my exam mark for chem only came back 81???? Which gave me a hsc mark of 83. Now the girl ranked third in my school got an exam mark of 88?!?!? And a hsc mark of 85, when averaged with her 83 assessment mark. Is this possible at all? Should i appeal?