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Counting Methods - GMATPrep [#permalink]
31 Aug 2007, 09:23
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A certain office supply store stocks 2 sizes of self-stick notepads, each in 4 colors: blue, green, yellow, or pink. The store packs the notepads in packages that contain either 3 notepads of the same size and the same color, or 3 notepads of the same size and of 3 different colors.If the order in which the colors are packed is not considered, how many different packages of the types described above are possible?