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Windows 7: Today's Puzzle

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16 May 2013   #1
mitchell65

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
5,357 posts
 
 
Today's Puzzle
There are three discs, Each on has a "7" on one side and an "8" on the other side. If thrown up radomly, how many combinations of numbers is possible. (Example "777" "888" etc)
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16 May 2013   #2
boohbah

Microsoft Windows 7 Home Premium 64-bit 7600
14,762 posts
 
 
Im FIIK
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16 May 2013   #3
mitchell65

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
5,357 posts
 
 
Quote   Quote: Originally Posted by boohbah View Post
Im FIIK
So what's new in Truro?
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.

16 May 2013   #4
Kari

 
 
Quote   Quote: Originally Posted by mitchell65 View Post
There are three discs, Each on has a "7" on one side and an "8" on the other side. If thrown up radomly, how many combinations of numbers is possible. (Example "777" "888" etc)
2 * 2 * 2 = 8 combinations.
  • 777
  • 778
  • 787
  • 788
  • 877
  • 878
  • 887
  • 888
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16 May 2013   #5
mitchell65

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
5,357 posts
 
 
Quote   Quote: Originally Posted by Kari View Post
Quote   Quote: Originally Posted by mitchell65 View Post
There are three discs, Each on has a "7" on one side and an "8" on the other side. If thrown up radomly, how many combinations of numbers is possible. (Example "777" "888" etc)
2 * 2 * 2 = 8 combinations.
  • 777
  • 778
  • 787
  • 788
  • 877
  • 878
  • 887
  • 888
But 778 is the same as 787 is the same as 877
788 is the same as 878 is the same as 887
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16 May 2013   #6
Kari

 
 
Statistically not. When counting the probability of a certain combination, then you need to count every disk having 2 possibilities, giving the formula 2*2*2 = 8 = 2³. Statistically 778 is not the same as 787 or 877 when analyzing results.
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16 May 2013   #7
boohbah

Microsoft Windows 7 Home Premium 64-bit 7600
14,762 posts
 
 
i see your not from Truro kari (or helston! ) , nor me im Glaswegian.
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16 May 2013   #8
Kari

 
 
Quote   Quote: Originally Posted by boohbah View Post
i see your not from Truro kari (or helston! ) , nor me im Glaswegian.
I'm not sure if that's flattery or mockery, so no comments...
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16 May 2013   #9
mitchell65

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
5,357 posts
 
 
Quote   Quote: Originally Posted by Kari View Post
Statistically not. When counting the probability of a certain combination, then you need to count every disk having 2 possibilities, giving the formula 2*2*2 = 8 = 2³. Statistically 778 is not the same as 787 or 877 when analyzing results.
True in a way but please read the puzzle again. Forget numbers and look at the puzzle as it is written. There are four ways the discs can land
1) three sevens
2) three eights
3) two sevens and one eight
4) two eights and one seven

Answer four
Q.E.D.
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16 May 2013   #10
boohbah

Microsoft Windows 7 Home Premium 64-bit 7600
14,762 posts
 
 
ps....Urban Dictionary: FIIK
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