Hello aspirant

Expected qualifying marks for obc candidate may be 70-90 based on recent trends. Although it may differ based on cut off this year.

To know about colleges and branch based on your marks you can you our college predictor tool

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Thank u

It would be difficult to tell you the exact qualifying percentile but as per the previous year cutoff you should have 74.3166557 percentile as OBC category to write JEE Advanced.

You can also use JEE Main College Predictor tool given below to know your admission possibilities of Institutes & branches as per your percentile. https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Thank YOU.