Hello.
For being at a safer side you should score 130 + marks in WB JEE for having admission into jadavpur University with your desired branch  if talking about rank which you need to have in WBJEE for IT branch so you need to have rank more than 350 as per the previous year cut off if you want to know more about previous year cutoff which can give you a probable idea of latest cut off, you can go with the below link
https://engineering.careers360.com/articles/wbjee-cutoff
Best of luck.

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