Hey Soumyadeep,
Well, You have every percentage just correct except your 10th standard marks. But still there are quite a few industries and multi-national companies that take candidates from 55% or more. You can go for Syntel or Tech Mahindra. You can also go for companies that run on a much smaller scale than such high runners as TCS or IBM or Accenture etc. To get knowledge on such companies and their vacancies you will have to register yourself in a online job portal. You can go for www.naukri.com or www.coolavenues.com or www.naukriaim.com etc. There you have to register yourself with all the necessary information about yourself, including your date of birth, academics, extra accolades, any national or international achievements, etc. Now as soon as you submit these information, the web portal will match the information with their present database of company recruiters. If this matches with the set of companies present they will then and there show you the results for you to choose the company of your preference.