Pondering over your past academics will do you no good. It’s not that you can change your marks by checking the minimum marks required. The best way is to focus on preparing your CAT as it’s the controllable way you can get shortlisted. You cannot change what has happened and wasting your time worrying about those marks will only hinder your preparation and performance in CAT.
You can do that once you have performed excellently in CAT and the score is out.
Most importantly, you are not aiming for IIM A B, or C. It’s just INT Ghaziabad we are talking about. So its cutoff should not be your only goal. Aiming a little higher for the CAT exam is one of the most crucial entrance exams that can make or break your career.