Hello,
Last year the cut off for OBC-NCL category was as follows for admission to Computer Science Engineering in Indian Institute of Technology Delhi
To check the previous year cut off use the link below
https://josaa.nic.in/Counseling/seatallotmentresult/currentorcr.aspx
Considering the cut off you need to secure category rank under 100 if you are a male candidate, around 340 if you are female candidate. Cut off is subjected to change, it may increase or decrease depending on the total number of candidates appeared, difficulty level of examination and total number of seats available etc.
It is quite difficult to predict the marks that you need to score because the total marks for JEE ADVANCED vary every and the marks vs rank trend also vary. To secure such rank you need to score minimum 50-55% of total marks. This is the estimated score the actual rank may vary with the given score.
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