what is iim ahemdabad selection critaria.i got 52% in 10th n 72% in 12th n i belongs to sc caste.is it fits to selection critaria

i want to join iima after clearing cat exam. i hv got 52% marks in 10 th n 72% in 12th by cbse board.i belongs to sc caste category.is it fits to iim ahemdabad selection critaria.plz clear my confusion before i start preparing for cat.if there is any chance to get admission in iim.