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how to approach this
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04 Mar 2017, 04:30
hi,
here is the question,
jack receives instruction for 12 clients and uses color coding to identify each client , if either a single color or a pair of two colors is chosen to represent each client and if each client is uniquely represented by that choice of one or two colors , what is the minimum number of colors needed for the coding?(assume that the order of the colors in a pair does not matter)