Ideally, it is very difficult to predict Rank Vs Marks for various Categories as far as WBJEE is concerned. The Paper Toughness as well as Competition varies with Each Year. However, I would suggets you to target anything between 90-100 ( Ideally 75+) in WBJEE and be confirmed of a seat in JU CSE, IT or ECE being from SC Category, being a West Bengal Home State Student.

For more information about Jadavpur University do follow the link below

https://www.careers360.com/university/jadavpur-university-kolkata