Hello Nivetha

Dear, the cutoff changes every year and so it would be difficult to predict the marks range for admission in any college. Well, if you're applying for 85% state quota seats (i.e. in Tamil Nadu only) then your minimum score should be 520-30+ for admission in a government college, whereas for 15% AIQ seats- your score should be 620+                         You need to keep high target so that atleast you can score near to it or even more which will surely benefit you in getting admission in your desired college. Hope youryo getting my point.! So prepare well and study smart.! Focus mainly on NCERT for thesefew months and give your Bestttt possible.!                                      

Hope this helps.!

Good Luck.!