Maths Spl

If you are weak in maths, then science will not do. Take up commerce stream, without maths. What was your % in 10th? Strong and weak subjects? Tell me, so that I can guide you better.

See, if you are weak in maths then don't go for engineering. You say you are interested in science, then take up science without maths. And pursue any of these after 12th.
http://studychacha.com/discuss/212682-courses-after-12th-science-without-maths.html
But if you don't want to take up any of these. Just go for commerce stream without maths. Then, you can go for BBA-MBA, BCom-MCom,MBA,LLB,CA
Or directly LLB after 12th.

If you are keen on doing MBA, you should take up BBA course after 12th. But know this, BBA is a one way course; you'll be left with only one option after BBA, that is MBA. But if you do BCom, you have other options as well the option to do MBA.
1 more thing: Whether you do BBA or BCom, after 3yrs you become eligible for compititive exams like IBPS, UPSC, SBI-PO, SBI-Clerk and other bank and railway exams. All the best !!

Nah! Maths level is very easy. You just have to complete every chapter from class 8, 9 and 10 maths. Little focus will help alot.

Yes, you can do. There are colleges like StXaviers that take students who had maths. But there are colleges that take students who did not have maths. Just check the your eligibility in the college in which you want to apply before applying.

No, it's not necessary to have mathematics.