What is the difference between permutations and combinations?

My teacher had told me in details about it, but I seem to find the concept of combinations and permutations difficult. I need some help.

Answers
A permutation is an arrangement of items but a combination is an arrangement that is ordered.
javaid.aslam
15 May 2011
http://mathforum.org/dr.math/faq/faq.comb.perm.html
javaid.aslam
15 May 2011
Here is a website that may be able to help
javaid.aslam
15 May 2011
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