I'm going to blame being late on having to go to my grandma's for supper, and then having to go to a concert. My grandma thinks that my mom can't cook or something... anyways, I don't have much time so here it goes.
Permutations...(from wikipedia) is the rearrangement of objects or symbols onto a distinguishable sequence. Each unique ordering is called a permutation. Permutations can have no repeats either. for example... ( see if I can make one up)
if you wanted to see all the ways you could take the letters from CARS, and make two letter "words", some permutations would be...
CA, CR, CS, AC, AR, AS, RC, RA, RS, SC, SA, SR,
( see that I never used CC, AA, RR, or SS )
there’s got to be more that can be taught about this and why it’s useful but this is all I have time for...
There is software for permutations, I didn't download it because I didn't have time and whatever but it's at this link.
These are other links that I used but didn't get all the info off of...you might want to use if you have any more questions that haven’t been answered
http://mathworld.wolfram.com/Permutation.html http://www.themathpage.com/aPreCalc/permutations-combinations.htm http://regentsprep.org/Regents/math/permut/Lperm.htm http://mathforum.org/dr.math/faq/faq.comb.perm.html