According to the official website http://www.ignou.ac.in/ignou/aboutignou/school/soe/programmes/detail/90/2 , for being eligible for B.Ed at IGNOU, you should have completed your Graduation in Sciences/Social Sciences/Humanities/Engineering or Technology with a minimum aggregate of 50%. So if you have secured a minimum aggregate of 50% in your Graduation, after your BBA, you can pursue B.Ed. For more information, please visit their page: http://www.ignou.ac.in/userfiles/FAQs%20on%20Eligibility%20for%20Admission%20in%20B_eD.pdf You can also reach out to them at: soe@ignou.ac.in