Hey,
Your question is bit ambiguous and incomplete. I assume that you mean to tell  you had Mathematics along with Computers in class 12th and you are confused about thr course you should take in your graduation. If that's the case, then you should be sure of your calling first. You need to be sure of your interest and work accordingly. There are various courses like Engineering, BCA, BBA or normal B Sc courses that you can go for.
Hope this helps.
Good luck.