rubbish .. it is an absolutele nuisance to say that one shud prepare the third subject for cutoff ... nothing can be more disastrous than this approach ... instead keep a good stranglehold on all the three subjects .. and if that is not possible ... make sure that the third subject , even if u are not that gud as the other two . u r still beter than most others ...
and yes covering the syllabus is more important ...,this notion of first itself targeting 70% syllabus is not right .. i am sure with this approach one can no get nar the mark ... instead try ur best to do as much can from the syllabus ... and keep ur basics absolutely strong ... be the jack of all but the master of the max possible course u can ... no limits there .... and for maths u can go thru TMH i hope this helps
khud hi ko kar buland itna ki khuda bhi tujhse puche ...bol bande , teri raza kya hai