Well, first they get a few samples and mark them, which then they use as a sort of guide to determine what sort of marks will be in what bands or whatever. (You know when you get results back theres a sheet with columns, that has criteria and 17-20, 13-16 etc). You will never see the raw marks. The AOS is worth 40% (even though the raw marks are out of 45), the modules 60%. Don't worry about raw marks, it's the final aligned mark that counts.