The percentage of students who drop out or fail at IIM Lucknow differs significantly by batch.
There have been batches where only a few students dropped out and pursued another interest. At the same time, 10-15 students drop out of each batch because they have goals other than an MBA.
It is a personal factor that over time has an overall impact on the number of students discontinuing class. It says nothing about the institute and says nothing about the batch either. Failure is a matter of one's commitment to learning and education, and the number of students also depends on each student, so taken as a whole, it says nothing negative about the institution. In other words, failing or dropping out depends entirely on the individual and has nothing to do with the institution.