Aligarh Muslim University is a leading public central university which has A graded Institute by NAAC. Though this university neither release its cut off nor any particular data is available anywhere. As the competition is concerned there is no fixed cut-off for entrance. If you score is 90/150( for external student) you name will be there in the selection list definitely and for internal students 80/150 is sufficient to get admit to university.
Whatever it is based on previous year's students' experience. It can vary every year as per demand of competition.