We cannot tell exactly what the rank would be in ST category since it depends on various factors such as number of candidates who gave the exam in general category and ST category. But based on previous years ranks, the rank would be between 9000 to 15000 in ST category. If you know your JEE marks, then you may use the Careers360 JEE Main Rank Predictor to find your approximate rank. You can also try for a better rank in the next attempt between 18th July 2020 to 23rd July 2020.