T. John Group of Institutions

Hi,
Each university has its own criteria.
IIM Ahmedabad Admission is on the basis of CAT exam scores. IIM Ahmedabad organizes its own counseling round, which includes a group discussion round and Personal Interview. The selection process is pretty rigorous.
You need to log in to their site for the admission details and click on the apply for admissions icon. Be fast as the seats are limited and the standards are quite high.
See that you have the required cut off.
You can also check for an alternative which would give you equally good academics of good faculty and placements. Check on LPU ranked as number 2 in B-Schools with best placements. You can opt for provisional admission and check your seat in IIM because the refund policy would always give you your money back with minimum cut. You can similarly browse the details of academics in Symbiosis.