Hello aspirant,

You seem to have decent chances of getting a government seat, as per last year trend govt. Medical college, bettaih was alloted with marks of 547 under general categoryin 15% all india quota, chances increases with state domicile. As cutoff changes every year it is difficult to tell you exact chances. 

You may use college predictor for better predictions: https://medicine.careers360.com/neet-college-predictor

Best of luck!!