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A certain office supply store stocks 2sizes of self-stick [#permalink]
19 Nov 2006, 08:08
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A certain office supply store stocks 2sizes of self-stick notepads, each in 4 colours, blue, green, yellow, pink. The store packs the notepads in packages that contain either 3 notepads of the same size and the same colour or 3 notepads of the same size and of 3 different colours.
If the order in which the colours are packed is not considered, how many different packages of the types described above are possible?