This is assuming all OCR history r the same w the same overall marks (i cba to check) So following 2023 grade boundaries youd need minimum high Bs on ur other exams to scrape that overall B. (idk if some/all topics are the same) For the exam thats /50, youd need 30+, for the exam thats /30, youd need 19+ and for the exam thats /80 youd need 52+! a B grade following 2023 would be 57% so maybe youd need less than what i estimated!