which book is better for concept building RESNICK HALLIDAY or FEYNMAN LECTURES for physics? also which topic contains maximum weightage in algebra for mathematics? tell some good book for doing permutation and combination as i' m facing a bit problem in that?

Dear shashank

I will suggest you to refer RESNICL HALLIDAY .  

For iit jeee there is no fixed weitage, it  vary from year to year...
f you will see the pattern of last year papers,then you will find that question were framed in such a way that it include more than one chaptre. and in whole paper almost entire syllabus are covered .so it is not advisable to leave any topic.

For permutation and combination refer Arihant prakashan book and HALL Knight.

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