It is difficult to predict the exact cutoff for the college as they changes every year depending upon the difficulty level of exam , total number of candidates who gave the exam, etc. But if you want to get a rough idea about the previous year cutoffs for iim lucknow you can click on the link mentioned below
IIM L will proceed with the admission of only those candidates who secure 12 on 40 in PI.
For more information, refer to the link below..
I hope this information helps.