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OpenStudy (anonymous):
I am to determine whether the following problem contains a combination or a permutation. It says a medical researcher needs 30 people, to test the effectiveness of an experimental drug. If 113 have volunteered then in how many ways can 30 people be selected. I am thinking the answer is combination but I am unsure. Thoughts? Help Please?
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OpenStudy (anonymous):
It is indeed combination.
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