Hello,
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Yes, definitely you can make your career in IIMs. But IIMs only accept CAT students.
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So you need to attempt CAT examination and pass out with atleast 90%.
Only students who gets above 90%  are entertained in IIMs.
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First preferences are given to your CAT percentage and then minimum percentage you need to get in graduation is 50% which you are already scored . So don't get worried about them.
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Eligiblity criteria varies from IIM to IIM. So firstly make a decision of which IIM you want to go. It will be more easier to find out it's Eligiblity criteria. Once you are done with choosing IIM here is a link which will help you out there with eligibility criteria.
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https://bschool.careers360.com/articles/iim-admission-criteria

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