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OpenStudy (anonymous):

I know the answers but I don't know how to solve it Suppose a bin at a used clothing store contains 30 pair of shoes, but the 60 shoes are all mixed up in the bin a. how many sets of two shoes (paired or unpaired) can be drawn from the bin? b. How man of those two shoe sets in (a) are pairs? c. how many four shoe sets can be drawn? How many of these consist of matched pairs?

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