Hi Tanushree! Your calculations are not correct as per ICAI Rule.Refer relevant portion of ICAI FAQ which clearly says that u can appear in CA Final exam only after completion of ur Articleship period.i.e.,after June 2010 in Nov 2010 only.
Relevant portion of ICAI FAQ
Q. When a student of Professional Competence Course (PCC) who switch over from Professional Education (Course – II) (PE-II) can appear in the Final Examination?
A. The period of articled training for a student of Professional Competence Course (PCC)
is three and a half years whether he/she has joined PCC after passing Common
Proficiency Test (CPT) OR has switched over from PE-II to PCC. Such a student can
appear in the Final Examination only after completion of full period of his/her articled
training i.e. 3 ½ years and not before.