Dear applicant hope you are already familiar with the fact that most of the B.Schools only accept entrance exams like CAT and you can get your admission accordingly based on your score. However if your targets are the IIM'S like IIM Calcutta, Ahmedabad, IIM Kozhikode, Bangalore then you have to score more than 90 percentile and same goes for the IIT's, your cut off will remain high. But you can target Vinod Gupta School of Management or Department of Management under Indian Institute of Madras too. Try to score well in CAT, this will bring positive change in your life.

Good luck!!