I am a science student and I have failed in maths, but in my final result is pass. Can I do BBA?

You are a science student and now pass in 12th yes U can do BBA but U should have to do BBA from Private college bczz u have only pass with less percentage so try for private college and take admission.

After clearing your maths subject you can go for BBA admission. You will get admission after clearing your 12th subjects.

Nope, first u have to clear all the "backs" u get in past. Universities not work like that.