2. If you have CHOOSE A NUMBER BETWEEN 7 and 20 people, how many ways are there to:

I chose 9
a. Arrange them in a line
362880 ways to line them up
b. Arrange them in a circle
40320 ways
c. Select a president, vice president and secretary?
I think the answer is 504

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2. If you have *CHOOSE A NUMBER BETWEEN 7 and 20* people, how many ways are there to:

2. If you have CHOOSE A NUMBER BETWEEN 7 and 20 people, how many ways are there to: