Hi there,

If you want to know about the marks vs rank for jee advance. So here is the small analysis based on previous years exams.

For first rank no doubt you have to score the most that is around 90% marks

Then if you want stay under top 100 then your marks should be 70% of the total marks

For staying in top 500 try to score around 55% marks

For getting a position in top 1000 the score should be around 50%

For getting into the top 5000 the score should be 35-40% of the all.

Yet the jee advance pattern and marks changes every year so it is hard to predict exactly but this data will definitely guide you a bit.