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how to approach this

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Intern
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how to approach this [#permalink] New post 04 Mar 2017, 04:30
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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)

thank you
siva
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Re: how to approach this [#permalink] New post 15 Apr 2017, 14:50
Whoops! No answer choices. Believe the min number would be 7 colors.
Re: how to approach this   [#permalink] 15 Apr 2017, 14:50
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how to approach this

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