Published On Dec 20, 2011
Art of Problem Solving's Richard Rusczyk introduces 2-circle Venn diagrams, and using subtraction as a counting technique.
Learn more: http://bit.ly/ArtofProblemSolving
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Art of Problem Solving's Richard Rusczyk introduces 2-circle Venn diagrams, and using subtraction as a counting technique.
Learn more: http://bit.ly/ArtofProblemSolving