Hello aspirant,

Admission in IIMs are dependent upon different criteria while the most important and the thing which carries the most weightage is the CAT scores, For admission in Different IIMs there are different cutoffs while some go upto 99-100 percentile others go up to 80-85 also, it depends on caste and category aswell, other than that in top IIMs you will be able to get admission on the basis of GD scores, PI scores, experience scores, 10th, 12th and graduate percentages etc.

There are a lot of factors associated with admission in IIMs and you can know the required cutoff and more information about it in the following website,

https://bschool.careers360.com/articles/iim-admission-criteria

I hope this helps.