Karan, CAT score is only a part of the selection procedure. Your performance in GD or WAT and the Personal Interview also matters along with your academics and job experience.

According to the past years' cutoffs, you need around 70 percentile in CAT exam to get a call from the old IIMs A, B, C and L for SC category students. But you also need to ace your subsequent rounds and it's only then that you can secure a seat in the IIM. All the best.

If you want further information on category wise cutoffs in various IIM campuses, you can visit the given link: https://bschool.careers360.com/articles/cat-cutoff/amp