Hello Aspirant

Seeing as you took 6-7 subjects in your 12th grade, I'm pretty sure that not all of them are mentioned in your 12th mark sheet. And because they were not mentioned in the mark sheet, that is why you were able to take admission to a BA program. It is totally okay if you failed your math exam as it has nothing to do with your current field of study, i.e. Arts/Humanities. If you were doing a Bachelor's from a science background, this might have posed a problem, but not for you.

Some companies, IT firms may ask you questions about it, and be a bit skeptical, but you can answer them honestly. But don't stress about it.