I study in Narayana junior college in FTB (Fast track batch). I am scoring around 140-150 in JEE Mains weekend exams. How much marks can I expect in the final JEE exam?

I think it may be 120 or 160 according to the future scenario of mains 2021.Because this exam is percentile based. In my regards you should know your campus rank and batch rank. It will give you an idea. Not your mark.