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Mathematics 20 Online
OpenStudy (anonymous):

# use the formular nCr a club of six members is to choose 3 officers, president, vice president, and secreatrary if each office is to be held by one person and no person can hold more then one office 4:25 pm # prettychicka45: in how many ways can the office be filled

OpenStudy (anonymous):

Well, using nCr, you have 20: 6!/3!3! But I would argue that a permutation should be used, not a combination, since 'order' matters.

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