Hey, most of the University or college ask for passing certificate of 10+2 and you will have to be qualified in all the subjects in order to apply for BA LLB. I feel that you better sit for the math exam and clear it. You may try your luck but no good institute is going to accept a failed mark sheet even if some low rated private may, that is also not guaranteed. Please do write the exam, clear it and then apply for all sorts of exam you wanna try. Best wishes