hi,

see admission in many colleges for bca has no mandatory  criteria like 12th course mathematics is compulsory for admission , however you may work as web developer, office executive data analyst , graphics designer like position after completing BCA Course. you may also appear in bank po, ssc cgl like exams after completing BCA. however for mca course some of the top ranked Institute like Nits has eligibility   criteria like candidates must have studied maths in 12th course to become eligible for admission.

hope you understand.