Firstly, India has got a tough reservation system which we need to pass through, more than the exam. So, it largely depends on what category you belong to. If you're general, the chances get minimised while for Sc/ ST or OBC, there is still hope.Another parameter is the state qouta, If you belong to TN, you get 85% seats which are reserved only for TN stidenst. For that, a general category student needs about 550/720. But if you're from other state, it is above that.