<PRE><B>Question 545807</B>
&lt;br&gt;&lt;font face=&quot;Tahoma&quot;&gt;What you are showing is what is called a permutation.&lt;br&gt;

Permutations (and combinations) are used in probability and statistics to find certain numbers.&lt;br&gt;

For example, the number of ways a group of 5 books can be arranged on a shelf.&lt;br&gt;

Permutations are order-specific, while combinations are not order-specific.&lt;br&gt;

A good example of a permutation is the Cash 3 lottery,&lt;br&gt;

while a good example of a combination is the regular lottery where the numbers can appear in any order.&lt;br&gt;

The formula for a permutation is:&lt;br&gt;

{{{nPk=n!/(n-k)!}}}&lt;br&gt;

In this case, your n is equal to 6, and your k is equal to 0.&lt;br&gt;

What they are asking then,&lt;br&gt;

is how you can arrange 6 items 0 at a time (or in groups of 0).&lt;br&gt;

Of course this sounds illogical, but there is only 1 way to do so.&lt;br&gt;

And if you put your numbers into your formula, you will get an answer of 1.&lt;br&gt;

Take it step by step, try some different numbers in the formula, and see how it goes.&lt;br&gt;

Reread your book, and if you still have questions don&#39;t be afraid to post them.&lt;br&gt;

I hope this helps!  :)&lt;br&gt;</PRE>