There is no telling how much you would score. Put in your best in practicals, they are marked really strictly. ^_^ However, if you mess up hard like I did, don't panic AT ALL! I had a D in my Physics Practical and a C in my Biology practical, but A in both subjects. with a percentile of 90 in Physics and 92 in Biology. Put your heart and soul in the theory instead, followed by the MCQ papers. If you are appearing in a full A2, then your P4 must be terrific too.