Dear aspirant!

Hope you are doing well ! However your question is slightly unclear but i think you are asking about the minimum marks for an sc candidate to get in jee main to qualify for jee advanced. So getting more than 80 marks will surely qualify you for jee Advance..

This year if a candidate from sc category get 48 percentile means approx 35-40 marks then he is qualify .

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/exams/jee-advanced/amp&ved=2ahUKEwjz9NXIz8b5AhVvyjgGHQinAyoQFnoECAwQAQ&usg=AOvVaw10UXgx6BovEcqJEdH9lyPX .

Hope it helps you !!