Hello,
The top 20 percentile of Bihar board is usually declared during jee mains and before jee advanced exams.
You can refer to the cutoff marks of 2019 for reference.
Consider 350 marks as safe for general category,345 for OBC and 330 for SC,ST.
Hope that helps!
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile