Hello aspirant,

I reviewed JEE Advanced 2017 question paper and here is the detailed analysis about that.

JEE Advanced 2017 Paper-1

Mathematics: 51% of questions from Class XII and 49% of questions from Class XI.

Physics: 49% of questions from Class XII and 51% of questions from Class XI.

Chemistry: 46% of questions from Class XII and 54% questions from Class XI.

JEE Advanced 2017 Paper-2

Mathematics: 79% of questions from Class XII and 21% of questions from Class XI.

Physics: 52% of questions from Class XII and 48% of questions from Class XI.

Chemistry:54% of questions from Class XII and 46% of questions from Class XI.

According to above analysis I suggest you to focus on Class XII syllabus for JEE Advanced 2017.