You have a strong profile.
Work Experience: You have ten years of work experience , and you have worked in 4 different countries for 8 years now which makes you a candidate with strong international experience.
Academics: Impressive- You have great GPA in your Bachelors and Masters . Your GMAT score : 700 (Q 48 V 38 both 82 percentile) is also good.
You seem to have good extra -curricular and community service experience as well.
Now answers to your questions :
Q- Will I have a chance?
In addition to the above mentioned components, your chances of selection will largely depend on how well you present your candidacy in your essays - your goals , accomplishments, leadership experiences etc. Also, you should have strong recommendation letters and crisp and precise resume outlining your career history and accomplishment.
Q - Should I re-take GMAT to bring my score to 720? Is it worth the effort since my academics are already strong.
Since you belong to the over represented applicant pool ( Indian, Male, IT )and you are targeting for top 25 global B-Schools, you will be facing tough competition, so retaking GMAT will be worth the effort.
Lastly, you have ten years of work experience, so I think you will benefit more from EMBA.
I hope it helped.
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