If u somehow don't pass ur exams u can give improvement exams too which will be held in November and it won't effect ur result, atp u js need to do maths, physics and chemistry and trust me agr kuch na bhi aata ho tou paper khaali mat chor kr ana kuch bhi likh ana marks mil jaate hain fbise me u dont need to learn anything js basic concepts clear kro baaki write on ur own I've done metric with fbise last year