• Mar 29th 2010, 12:41 AM
OK,

I've got a question which is mega complicated for me, however thought if anyone could help it would be you guys.

I am going to be submitting an article to say 2000 article directories, now to get maximum exposure from the search engines, the article needs to be as unique as possible. Now lets say that the % of uniqueness I am going for, is 40% unique.

Lets say I have 20 different sentences and for each sentence there are 5 different options, so 20 x 5. The variables of the article get choosen completely at random, so taking this into account what are the odds/% that I will get a 40% unique article each time?

Having a formula would be great, because then I would be able to work out whether I need to increase sentences and options for sentences.

Sorry, I am still not sure about the definition. Let's define an article as a sequence $\displaystyle \langle x_1,\dots,x_{20}\rangle$ with $\displaystyle x_i\in\{1,2,3,4,5\}$. What does it mean for an article $\displaystyle a$ to be at least $\displaystyle n$% unique compares to a set $\displaystyle A$ of other articles? Does it mean that at least 8 elements of the sequence have to be different from the corresponding elements of other articles? Then does it mean that no other article has, for example, a given $\displaystyle x_1$, and no other article has a given $\displaystyle x_2$, and so on until $\displaystyle x_8$? Or no other article has given $\displaystyle x_1,\dots, x_8$ together? Or maybe this means that the given article must differ from every other article in at least 8 positions?