Yes, you will be able because 75% marks criterion ids for those institutes which take part in JoSAA, as state govt college does not give admission through JoSAA, therefore, they have different rules which vary from states.  So if you are Not among the top 20 percentile of Your 12th Board then You can go for State govt college.

In West Bengal, there are many colleges which accept JEE Main marks and many WBJEE.

Hello friend,thanks for asking this question on this platform.firstly if you want to do engineering then you have to give entrance exams like JEE ,wbjee etc.and for taking admission in any Government College and from 2019 it's mandatory that you must have to secure 75% in 12th for general category and 65% for sc/St for taking admission in any IIT/NIT .but it is not mandatory for other satte govt engineering colleges .so you can take admission at there .thanks