Hi ashokjha1986,
The process of applying to (and ultimately attending) Business School will require a big investment of time, money and energy on your part, so you really should make sure that the Programs that you apply to match your career goals/needs. There are a variety of factors that go into selecting the Schools that you'll apply to. Instead of just applying to Programs in which you might have a good chance to 'get in', here are some other things to think about:
1) Is there a particular company that you want to work for or industry that you want to work in? Certain degrees are more appropriate than others if you have a specific career goal.
2) What do you want your MBA to do for you?
3) Do you want to go to School full-time or part-time?
4) Are you willing to relocate? Are you comfortable with working through a program that is primarily online?
5) Are you going to be applying for scholarships?
Etc.
It's okay if you don't have answers to any of these questions just yet, but you really should try to define all of the important variables in terms of your goals, so that you can tailor your entire approach to getting into the best School that matches what you're looking for.
When it comes to studying for the GMAT, there are lots of different resources that you could use. Unfortunately, you won't know what you 'need' until you try some of them and we get a sense of how well you're scoring. In my prior post, I mentioned that it would be a good idea to take an initial CAT - and that's still what I suggest. Based on that score result, we can talk about how best to proceed with your studies.
GMAT assassins aren't born, they're made,
Rich