Hi shisin . So as you are curious enough to know that how much marjs should a sc students should score to ger computer science in Indian institute of technology so let me tell you that its a tough path so as indian institute of technology are one of the most prestigious institution of india and with that the computer science branch is the most demanding branch . So atleast a student should score 45 percetage of marks in sc category to get computer science in iits why i m not mentioning score because that depends on the marks of the paper which is never fixed .

Hope it helps