Hello Parmar,

Yes offcourse, Crash course is helpful but for someone who has prepared  his/her all syllabus through self study and want to go for a deep and quick revisons of all subjects .

As crash course is a short term course provide by  diffeent coaching institute like FITJEE,ALLEN ,AKASH and so on.

If you want to go for a crash course and you are a such type of candidade as I mention in begining then you should go for that and there is a suggestion from my side is that you should join atleast one test series either online or offline because it helps a lot.

Thank you :)

hope it helps