Hello, The minimum mark you need to score will be around 55 and the closing rank is around 6000 in the category ranking. You can find the previous year cut off the various IIITs using this link https://engineering.careers360.com/articles/jee-main-cutoff-for-top-iiits#JEE-Main-2017-Cutoff-for-IIITs-SC-Category
Best wishes.
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