Ruth H.

asked • 03/21/16

Permutation, Combination or simply the Counting Principle?

Can you please point me in the right direction?  For each of the following questions, would the correct approach be to calculate the permutation or combination, apply the counting principle, or use more than one approach to find the correct answer?
 
1.  There are 24 contestants in the Hunger Games. Citizens at the Capitol placed bets on who would win. How many orders are possible for the first, second, and third person eliminated? Assume that only 1 person can be eliminated at a time. Show your work.
 
2.  Suppose that each of the 24 contestants at the Hunger Games confronts all the other contestants but none die in the process. How many total confrontations would there be for each contestant to confront all the other contestants exactly one time? Use drawings or lists to help organize your thoughts. Show all work.

1 Expert Answer

By:

Arnold F. answered • 03/21/16

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College Professor & Expert Tutor In Statistics and Calculus

Ruth H.

Not quite sure...   How does this look?
 
1.  24P3 = 24x23x22
 
  which is 12,144
 
2.  Is this one solved like a handshake problem?   n(n-1)/2
 
   (24)(23)/2 = 552/2
 
                   = 276

Here is where I am even more confused... I want to work this out using combination, but is this a combination of 24 items taken 24 at a time?
 
     24C2424P24 /24 
 
               = (24!/23!)/24
 
               = 1
 
As you can see, this doesn't make sense...
 
Thank you for your help!
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03/21/16

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