Dear Samant, the eligibility criteria states that Candidates should score 60% individually in Physics, Chemistry and Mathematics and complete their 10+2 with a minimum aggregate of 75%. It is not an option between either of these aggregates but a Candidate should meet both these 2 aggregate criteria to be eligible for BITSAT. In your case, because you do not meet the 75% criteria, you are not eligible for BITSAT. Even if you appear and qualify for the exam, you might not get admission because you do not fulfil the criteria.