SOLUTION: How many different ways can a chairperson and an assistant chair be selected from a research project if there are seven scientists available?

Question 1100938: How many different ways can a chairperson and an assistant chair be selected from a research project if there are seven scientists available?
Answer by ikleyn(52795) (Show Source): You can put this solution on YOUR website!
.

Any of                   7 scientists can be selected for the first position,

and any of the remaining 6 scientists can be selected for the second position.


All these selections are distinguishable.


Answer.  There are 7*6 = 42 ways.

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