If a ST student gets above 65% marks in Intermediate and around 70 to 50 (app.) marks in EAMCET should be able to get free seat in any subject in All government colleges and top private colleges. Although, getting better score will help you get into a better college. As your marks is 47 you can give it a try !

The rank and marks depends on various factors such as difficulty level of paper or the number of students appeared in the exam.

Good luck for your bright future !