Hello Amandeep,You can check out the following link for detailed info on PU BALLB cutoffs: 

 https://law.careers360.com/articles/pu-ba-llb-cutoff

cutoff for admissions to PU BALLB course depend on both your class 12 aggregate and marks in PU BALLB entrance exam (50% each). If you have a combined score of 150+ admission can be assured for you which means a minimum of 60+ marks in the entrance exam. however since you have SC category, you may still have a faint chance of making it. keep on checking the cutoff lists and college website for this