Probability question

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how many different ways can a chairperson and an assistant chairperson be selected for a research project if there are seven scientists available?

May 12th, 2015

A chairperson can be any of 7 so there are 7 variants. Then there remains 6 variants for an assistant chairperson, i.e. 7*6=42 total.

May 12th, 2015

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May 12th, 2015
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May 12th, 2015
Jun 26th, 2017
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