if i will clear my b.com correspondence final year only with 50%,,then can i go for bank po job in sbi ?

yes Honey, you will be eligible for job in any bank. They just require graduation degree with passing marks but it may be create problem at the time of selection. because they made merit list to mass elimination.

Min percentage for top banks/public sector banks is 60% and that too 10+2+3 full time graduation