Hi, I would like to inform you that, unfortunately, determining cut offs/rank is quite a difficult process they change every year depending on no. of seats avaialble, no. of applicants seeking admission and appearing for the entrance exam, difficulty level on the entrance paper and the subsequent result. So if you have scored marks around 100 then you have a good chance get admission to the course in the main campus. 

The cut off percentage for ST category is 25% which is 90 marks out of 360 marks

Good Luck