can I pursue BBA LLB after 12th if I took humanities without maths or economics?
As per the Constorium of National Law Universities for CLAT the eligibility requirement is that candidate must have passed or appearing class 12 in any stream with minimum 45 percent marks aggregate from a recognized central or state board.
So yes you're eligible to take admission in BBA LLB (Hons.) without mathematics & Economics.
I hope my answer helps. All the very best for your future endeavors!