Hello Shreyansh Shrivastav. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

I have to say that it may be the deciding factor for whether you are eligible to write BITSAT or not. I would like to direct your attention to this link for the eligibility criteria for BITSAT:

• http://www.bitsadmission.com/Eligibility_Criteria.aspx

Summary: The candidate should have obtained a minimum of aggregate 75% marks in Physics, Chemistry and Mathematics subjects (if he/she has taken Mathematics in BITSAT) or a minimum of aggregate 75% marks in Physics, Chemistry and Biology subjects (if he/she has taken Biology in BITSAT) subjects in 12th examination, with at least 60% marks in each of the Physics, Chemistry, and Mathematics / Biology subjects.

Hope this helps you and all the best!