Hello Das,
To get admission in to the college you are expecting, you must have a score above 500 to secure your seat. If you are a domicile of the state then you require 465+ marks and management state quota seat you require 430+ score.
However the cut off varies each year so you can't predict the exact cut off.

Hope this helps.

Regards

Since all the private medical college is under state quota and not in AI-quota, it’ll require around 400 (UR) to get in a private medical college. Sometimes it also depend upon the rest competitors as north-east region needs little bit lower marks as compared to other states. The cut off might be slightly higher due to more competition due to increased number of candidates.  

Best of luck

Thank you.