This is a question which is difficult to answer. But let me share my friend’s experience which might give you a clear idea.
I can say only about his coaching center which was TIME CP center. According to the placement report of the IIM Indore for the year 2021, there were 107 IPM students in the latest pass-out batch of 2016-21. His center had around 30-40 students preparing for IPM at IIM Indore and of those only 1 got selected.
He was an IPM at IIM Indore aspirant. But the composite score cut-off in the year 2018 was 50.75 and he was way below it.