<PRE><B>Question 1152555</B>
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Formulation in your post is &amp;nbsp;1) &amp;nbsp;INCORRECT &amp;nbsp;&amp;nbsp;and &amp;nbsp;&amp;nbsp;2) &amp;nbsp;MAKES &amp;nbsp;no &amp;nbsp;SENSE.


It is because the term &amp;nbsp;PERMUTATION &amp;nbsp;&lt;U&gt;never goes in combination&lt;/U&gt; &amp;nbsp;with the words &amp;nbsp;&quot;&lt;U&gt;taken two at a time&lt;/U&gt;&quot;.


In  combinations with words &amp;nbsp;&quot;&lt;U&gt;taken two at a time&lt;/U&gt;&quot; &amp;nbsp;goes the term &amp;nbsp;COMBINATIONS.



On Permutations and Combinations, see introductory lessons


&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF =http://www.algebra.com/algebra/homework/Permutations/PROOF-of-the-formula-on-the-number-of-permutations.lesson&gt;PROOF of the formula on the number of Permutations&lt;/A&gt;

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF =http://www.algebra.com/algebra/homework/Permutations/Problems-on-Permutations.lesson&gt;Problems on Permutations&lt;/A&gt;

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF =http://www.algebra.com/algebra/homework/Permutations/Introduction-to-Combinations-.lesson&gt;Introduction to Combinations&lt;/A&gt;

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF =http://www.algebra.com/algebra/homework/Permutations/PROOF-of-the-formula-on-the-number-of-combinations.lesson&gt;PROOF of the formula on the number of Combinations&lt;/A&gt;

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF =http://www.algebra.com/algebra/homework/Permutations/Problems-on-Combinations.lesson&gt;Problems on Combinations&lt;/A&gt;


&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF =https://www.algebra.com/algebra/homework/Permutations/OVERVIEW-the-lessons-on-Permutations-and-Combinations.lesson&gt;OVERVIEW of lessons on Permutations and Combinations&lt;/A&gt;

in this site.  &amp;nbsp;&amp;nbsp;// &amp;nbsp;&amp;nbsp;I listed here the &quot;introductory&quot; lessons only . . . 


Also, &amp;nbsp;you have this free of charge online textbook in ALGEBRA-II in this site

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson&gt;ALGEBRA-II - YOUR ONLINE TEXTBOOK&lt;/A&gt;.


The referred lessons are the part of this online textbook under the topic &amp;nbsp;&quot;&lt;U&gt;Combinatorics: Combinations and permutations&lt;/U&gt;&quot;. 



Save the link to this textbook together with its description


Free of charge online textbook in ALGEBRA-II
https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson


into your archive and use when it is needed.


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