Sorry to say but you are not eligible to apply for the MCA without studying math’s in 12th and BCA, the basic requirements for the MCA course are as following:

Eligibility:
The applicant should have completed graduation, and Candidates must have mathematics as a subject in their 10+2 course or any one year of graduation. B.C.A. qualified candidates can also pursue M.C.A.

The MCA course provide following types of the employment opportunities:
Application Software
Development
Engineering
Hardware Technology
Internet
Software Development Networking
System Management
Trouble Shooting