Dear Arumugam, CA has 3 phases as in Foundation, Intermediate, and Final. For CA Foundation, you should have at least appeared for your 10+2 examination from any recognized Institution. There will be 4 papers for CA Foundation course. For appearing in CA Foundation exam, you should have completed 4 months of the study period and have qualified 10+2. While there is no specific aggregate that you need to score in your 10+2, you should score a minimum of 50% in aggregate and 40% in each subject individually. So for CA Foundation, even you pass your 10+2, you are qualified to write the exam.