Hi

It is very difficult  to predict because marks vs rank keeps changing every year depending upon a number of factors like

*Number of students that appeared in the WBJEE exam

*difficulty level of the WBJEE examination

*Kind of marks obtained by the students in the WBJEE exam etc

But yes,

To get around 400 rank, you should target at least around  150 marks out of 200 marks in your wbjee examination as per our rank predictor at

You can also refer our page for marks vs rank for which link is given below

https://engineering.careers360.com/articles/wbjee-marks-vs-rank

After your wbjee examination,

To have a personalised report on your chances of getting a college you can go through our WBJEE college predictor, it will give you complete list of colleges which you can get on the basis of the category you belong to,  your , your gender etc the link for  WBJEE  college predictor is provided below

If you have any other doubt then you can always reach us to clear them :) we are always available to help you out and guide you

Thankyou