I'm doing finance now, if you planned on majoring in finance I think you will have a great deal of trouble, this from the first semester. Without even year 12 general I think you will have trouble with microeconomics 1 and maybe accounting which I think are both compulsory for most majors, statistics is a challenge for me, even having done extension maths, finance I think would be doable on 2unit but general would make it difficult.
A major in say marketing might not be too bad but I don't know.
If you've done business studies or economics it might be easier, but with no maths it's not unreasonable to say you won't pass a great deal.