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forum.virtualchallengemeets.com • View topic - Confusing Permutation Problem

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Confusing Permutation Problem

What could be so hard. It's a multiple-choice test for Pete's sake.
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Confusing Permutation Problem

Postby 88bobcat » Mon Feb 15, 2010 10:07 pm

[unparseable or potentially dangerous latex formula]

How many different 7-letter "words" can be created from the letters in MISSISSIPPI?


My answer to this is

[unparseable or potentially dangerous latex formula]

How is it that the permutation of these letters results in a non-integer number of permutations? I understand the division of the numbers, but this seems to contradict what I know about probability/permutations.

Can anyone explain this paradox?


[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]
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Re: Confusing Permutation Problem

Postby stupidityismygam » Mon Feb 15, 2010 11:05 pm

my avatar is pretty awesome
tytia
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Re: Confusing Permutation Problem

Postby hansond10 » Tue Feb 16, 2010 6:26 pm

You are only supposed to do 11! on the top because that is the total number of possibilities (11 options for the first letter, 10 for the 2nd, 9 for 3rd, etc.)

So it's ...

11!/4!/4!/2!
District 1- NS: 233; CA: 267; MA: 264; SC: 208 (Top Chem & Physics & 2nd Bio!); CS: 178
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Re: Confusing Permutation Problem

Postby 88bobcat » Wed Feb 17, 2010 11:04 am

[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]
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