A group of 12 persons are available for use in a study. Four are to be selected to receive an experimental treatment, while the remaining persons will serve as the control group. In how many ways can the control group be composed?

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- Mar 28th 2014, 06:08 AM #1

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- Mar 28th 2014, 06:13 AM #2

- Mar 28th 2014, 06:33 AM #3

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