Hello Kunal,
To get into branches like ECE, EEE, Mechanical here, you need to score at least above 160 (rank about 20-22k) in Mains provided you are from Jharkhand and for getting CSE you need to score above 180 (rank about 12–13k).
Exact marks are very difficult to tell because each year cutoff n ranking is changing. For sure short admission in nit Jamshedpur, u should score more than 130 to get any branch.
Hope this helps.
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