The sac scores and exam are scaled against each other. I'll give you an extreme example and hopefully you try and follow it.
Say for example every person in your accounting class gets 50% on every single sac. Then when the exam comes around, everyone in your class gets 90% or more. This would indicate that the sacs were in fact a lot harder than the exam and the 50% is not accurate. Their sac results would then get scaled up as a result resulting in higher scores.
If you get 90% on your sacs and 50% on your exam, it indicates that the sacs were too easy and the 90% is not accurate, your result would get scaled down. (I think that's what happens, correct me if I'm wrong)
My point is that it all comes down to lots of scaling. If you do bad or average on your sacs but manage to do really well on your exam, you will score highly. Maybe not a 50, but there's no reason why you can't get well above 40. Its a lot better to do average on sacs but smash the exam than to smash the sacs but do average on the exam.
Theres lots of variables to consider in regards to your result, the exam result, your classmates results etc. Just focus on getting an A+ on the exam and you'll be fine
