No, there is no Dual Degree Integrated Course at BITS Pilani. Perhaps, you may opt for M.Sc. Mathematics in First Year, incase your score isnt quite good enough for CSE. Work hard in first year and convert to a Dual Degree Combination as M.Sc. Mathematics + BE Computer Science. Computer Science + Mathematics/Economics combination is one of the most sought after by employers today.

For more information about BITS Pilani do follow the link below

https://www.careers360.com/university/birla-institute-of-technology-and-science-pilani