Hello,
If I consider the previous year data .Then you have good chances of getting admission in any of the government colleges in karnataka through state quota .You can definitely get a seat in a good  private medical college.
Browse the link given below for detailed information.
http://www.google.com/amp/s/medicine.careers360.com/articles/neet-cutoff-karnataka/amp
The cutoff changes almost every year,so not much can be predicted .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

Hiii hema...
Every year approximate cut off happens to be somewhere around 450. In 2015, it was 453 (for genrel) and this year, 2016 it was 468 (again for genrel category). But no one fetches a govt medical college if they lie near the cut off marks. The govt medical seats are very limited and so, reaching till 520(approx) all the seats are taken.

Answer to your question: There is a CHANCE of getting a govt medical seat only if you score more than 500. But if you reach somewhere more than 520, you'll definitely get a seat.
But in your case it is not so
I hope this helps. : )

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