If you are concerned about your past academic records then rest assured for the final placements don’t usually pay much attention to past academic records.
MBA is much more than just learning and writing your answers and scoring good marks. It is more about applying logic and increasing your decision-making skills. So to compensate for your poor past academic performance, become a part of the managerial committee and improve your resume. Enhancing your decision-making and managerial skills will increase your chances of getting a good placement than your academic background.
Also, FMS in itself is a brand name that will fetch you a good package.