Hey Mohit

Indian Institute of Management have set criteria for calling candidates for Interview round to which 10th, 12th and Graduation marks contribute. The AR is very crucial for overall CAT score, which is calculated through 0.5*(10th marks) + 1.5*(12th marks) + 2.5*(Graduation marks). [for IIM Ahmadabad]

In your case, you need to score at least 99.5+ percentile in CAT written examination to be called for esteemed and old IIMs'.

Later to which, you will be facing WAP and Personal Interview round, and if you excel in all rounds, your admission would be successful.