.Pls tell me that what is the minimum %tage i have to get in CAT to get addmission in IIM?Pls tell me an effective course for it(CAT) also.

Hi, Although, there is no minimum cut off for IIMs but there is no guarantee to get admission even after getting 99 percentile, so I would say the higher you score the better it is. There are several coaching institutes which you can join to prepare for CAT. Few of the known once are: Career Launch