Maths is not necessarily required for you to have studied in 12th standard in order to secure admission in BA(Hons.) Economics. However if you want to pursue BA(Hons.) Economics at Delhi University (DU) then maths is a requirement and without having passed maths in 12th standard you won't be eligible for this course at DU. Although there are other Universities and Colleges which provide this course without having studied and passed maths in 12th class.