Hello sumaiya parvej,

BITSAT doesn't count the overall percentage of your 12th exam but you should have obtained a minimum aggregate 75% marks in physics,chemistry and mathematics(if you are taking mathematics in BITSAT) or a minimum of aggregate 75% marks in physics,chemistry and Biology(if you are taking biology in BITSAT) with at least 60% marks in each of the physics,chemistry and mathematics/biology subjects.

If you fulfill these criteria then you can give BITSAT and you ha e to give your best in the exam to secure good rank as your admission will be based on the score obtained by you in the BITSAT entrance exam.