Why are you in such a rush to do an MBA?
Your chances are slim, and moreover, you'll have a hard time competing against your more experienced classmates for jobs.
It is in your best interest to work for a few years. You are very young, so you might as well take advantage of that and gain some real world experience rather than rushing into school where you will be significantly younger than your classmates and no matter how mature you think you may be, you will be a bit out of place socially (and a big part of b-school is building relationships with your fellow classmates).
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