CA

If you want to do CA, you should go with B.Com is much better. But if you want to go along with you BBA, you should have at least 60% marks in your degree to take admission in IPCC.

You need to be focused and work really hard.
All the best.

Both are good, but MBA gives you opportunities in all streams and CA is restricted to financial industry.
MBA provides with great management and communication skills which CA course lacks.

Hi,
Iit is good that you are considering event management as sometimes we understand our potential only after a while and not immediately. So, your knowledge of CA will be useful if in future you plan to open your own event management firm and will be good enough to handle the accounts and finance of your company. But, stick to your choice and do not change it frequently as after few years you will be competing with your juniors only.

Yes, you can go for CA, but you might find it difficult because you haven't studied accounts in BBA.

I suggest doing either one of them because both have their own values but it would not be a great combination to do both, if you're interested in management then do MBA else do CA.

CA and CAT both are nowhere related. But, it would be helpful if you finish it first because the CA tag will give you additional benefits during selection and placements.

Yes, you have good scope in Maharashtra.