In Graduation
The answer to your question is that it is the minimum eligibilty criteria and not the only eligibility criteria. There are several factors that each IIM considers before selecting/rejecting a candidature.Hope this helps.
Unfortunately you are not eligible for CAT as your marks in graduation is very low and there is no way now that you can improve the same.
All the best for your future!
Assuming you are from General category, you must aim for above 90 percentile to get into the top colleges of the country. So start preparing and give it your best shot.
All the best!
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