GMAT Practice Question Set #9 (Question 25-27)

Problem Solving Question #27: Python and Rails Developers  
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In a certain group of 10 developers, 4 developers code only in Python and the
rest program in either Ruby on Rails or PHP - but not both. If a developer
organization is to choose a 3-member team, which must have at least 1
developer who codes in Python, how many different programming teams can
be chosen?











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