Hello aspirant

hope you are doing well and safe. With reference to your query,  I would glad inform you that it is not possible to predict the exact marks because cut off for every rank varies every year due to varitation in large number of things like seat matrix , difficulty level and number of appearing in the exam . You should not think about the results , stay dedicated and focused about studies . Following is the link of cut off for reference:-

https://engineering.careers360.com/articles/jee-main-cutoff

Hope you found this answer informative. Best wishes for your future