Dear candidate as you know it is very difficult to score 70-80 percentile in CAT considering the difficulty level of the exam, but since you belong to SC Category you have moderate to low chances of getting IIM. As you know it is a very prestigious institution, so the marks requirement also remain high. So yes, if you make your chance it's great, but don't solely rely on one Institute, keep on trying for others,

Good luck!!

IIM can call applicants under the 6070CAT percentile, contemplating exquisite portfolios and caste / PwD categories. However, not only does CAT practice to IIM MBA admissions, however CAT consequences also are universal through different pinnacle B-Schools.