Hi Ashish.

I don't know whether WBJEE releases such a data. So, it is difficult to tell you the exact mark vs rank details. But, roughly, it'll be like this.

Marks > 213    Ranks < 10
212 to 200         11-50
199 to 188         51 - 200
187 to 175       201 - 600
174 to 163       601 - 1000
162 to 150     1001 - 2500
149 to 138     2501 - 4000
137 to 125     4001 - 6000
124 to 100     6001 - 10000
  99 to 75     10001 - 16000
  74 to 63     16001 - 25000
  62 to 50     25001 - 35000
       < 50              > 35000

Good Luck.