Hi gurucharan,
Your GMAT is certainly in range for CMU, and your work experience could be a bit interesting, as I'm curious why you switched from biotech to family business, and what you intend to do with your degree. Given that you're applying in the final round the hill is going to be steeper though since final round tends to have a lower admission rate at most schools.
Unfortunately your high school sports involvement is going to have minimal impact, and you should think through your charity work to see if any particular project had a strong impact on your leadership or personal development.
Transferring among MBA programs is fairly rare, I would not encourage it as a strategy.
If you're looking for essay review, I'd suggest exploring the hourly service from MBA Mission at:
http://www.mbamission.com/services.php?package=2
I'd be happy to work with you -- just mention my name when you sign up -- or we can match you with a consultant that best meets your needs.
Good luck!
Daniel Richards
http://www.mbamission.com
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