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As part of a game, four people each must secretly choose an

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As part of a game, four people each must secretly choose an [#permalink] New post 21 Apr 2005, 22:45
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As part of a game, four people each must secretly choose an integer between 1 and 4, inclusive. What is the approximate likelihood that all four people will choose different numbers?
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 [#permalink] New post 21 Apr 2005, 23:12
As part of a game, four people each must secretly choose an integer between 1 and 4, inclusive. What is the approximate likelihood that all four people will choose different numbers?

Total number of choice combos = 4x4x4x4
Number of choice combos where they choose diff numbers = 4!
(arrange 4 numbers into 4 empty slots = 4P4 = 4!)

Hence the answer = 4! / 256 = 3/32
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 [#permalink] New post 25 Apr 2005, 07:46
no more..................... :oops:
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 [#permalink] New post 25 Apr 2005, 11:08
MA wrote:
no more..................... :oops:


number of different arrangements is 4! and total of 4^4 is possible. so it is 4!/4^4 = 3/32
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 [#permalink] New post 25 Apr 2005, 18:36
Same approach as mckenna

total possibilities : 4^4
possibilities of 4 different numbers : 4*3*2*1 = 24

prob : 24/4^4 = 6/4^3 = 3/32
  [#permalink] 25 Apr 2005, 18:36
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