Inactive Tutor answered • 10/20/16
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New to Wyzant
12C9 will give you all the different combinations of 9 questions, chosen from the twelve that are available.
Maribel G.
asked • 10/20/16prob stats
An essay test has 12 questions. Students are required to answer 9 of the 12 questions. How many different sets of questions could be? answered?
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