Hello akula, 

The chances of getting in to IIM is 

1.eligibilty criteria,   

Person must have 50 percent of marks in his bachelor's degree for general category and for sc/st requires 45 percent or good cgpa from a reputed university

2. Admission criteria 

IIM'S  follow two step location process ,first shortlisting on the CAT  score and the next is written ability test followed by personal interview 

Maximum of IIM'S  gives maximum weightage to personal interview and CAT  score .

The factors  determining your success ,

**.effort ,optimization of learning process,good habits,positive mental attitude ,creativity,character.

Good luck 

Thank you