Very nice question raised here. The main reason for our students going outside for higher studies and preparation of Exam is because we don't have enough colleges in our state. Yes we have super 30 but as the name suggests it can take only 30 students, where will rest of all go? They have to go outside. We have to improve the situation by opening more and more colleges.
I agree that we had an awesome history and great personality in past days. But let's not forget the current situations and system of Bihar. Some year back there weren't enough college or university in Biahr and that's why students started going out to pursue higher educations. But good news is that now new Govt doing great hope after some years we will have enough colleges for providing education to all.
Now the Bihar and Jharkhand moving towards to education hubs. After few years our states have own IIT and IIM institution.