HI, Aspirant. Jadavpur University is one of the best and highly ranked universities in India. And getting into it is the dream of all the aspiring engineers, for the CSE department of Jadavpur University, the first round opening and closing ranks for Sc was 104 and 826 respectively.
For the second round, it was 132 and 1412.
for the third round, it was 209 and 2073.
and for final spot or fourth round, the ranks were 209 and 3370 respectively.

So to have a high chance of getting into the CSE department you should have a rank of around 1200-1300 which converts to around 110 or so marks in the exam.
While if you have luck by your side and can wait till the fourth round, a rank of around 2700-3000 will do good for you. 
So you have to score at least 95+ marks in the exam to confirm your seat.
All the very best for your future.