Hey,

The eligibility criteria for BITSAT States that the candidate must have completed 10+2 with Physics, Chemistry, and Mathematics as obligatory courses from a recognised institute. Along with it, candidate must have received a minimum of 75 percent in Physics, Chemistry, and Mathematics in the aggregate. In addition, the candidate must have received a minimum of 60% on each paper.

So, as it is clear, even, if you appear for the BITSAT and you clear the entrance exam, you will be marked as ineligible if you do not meet the requisite percentage score in class 12 PCM subjects.

Know in detail about it over here: https://www.careers360.com/exams/bitsat

Sorry to say that only those students can apply for BITSAT, who have qualified the class 12th board examination with a minimum required score of 75% in the aggregate of physics chemistry and maths  (PCM) OR physics chemistry and Biology (PCB). The candidate must also have an individual score of 60% in all the required subjects.