Hi Aspirant

This is Ritika.Hope you are doing well

Official data is bit available for marks vs ranks online.

You cna however check cutoffs based onnTnEA for reference.

https://engineering.careers360.com/articles/tnea-cutoff

You can alternatively predict ranks base don marks from 2017 cutoff data shared below.

https://engineering.careers360.com/articles/tnea-rank-predictor