Minimum eligibility for MBA is to have minimum 50% marks in graduation. However,there are various colleges that accept admission with marks less than 50% marks. Some of the entrance exams you can give for MBA are CAT, MAT ,CMAT ATMA etc. There are various colleges that accept admission to MBA with less percentage than 50% like Manipal University, KIIT etc. Before going to repeat the graduation ,you can check the colleges that accept graduation Mark less than 50%.