Hello,
If I consider the previous year data .Then you have good chances of getting admission in any of the government colleges in bihar through state quota on the basis of your marks.previous year minimum marks required by an obc candidate was 519 for government medical college bettiah.
You night also get admission in some other colleges through all india quota.
The cutoff changes almost every year,so nothing can be predicted much.cutoff depends on the difficulty level of the paper and the number of students who appeared for the entrance exam.
Just hope for the best
Browse the link given below for detailed informatiohttp://www.google.com/amp/s/medicine.careers360.com/articles/neet-cutoff-bihar/ampn.

Yes , dear student . You have scored enough good marks and there is a chance that you get government medical college. Don't just just hope for the best . You have obtained above 550 and you are on a safer side and you will definitely get admission. For further reference check the below link I am attaching.

https://medicine.careers360.com/articles/neet-cut-off/amp

I hope this is helpful .

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