Michael
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 Mar 28 awarded Commentator Mar 28 comment Permutation with Natural Ordering Thanks. I am new, but i understand more. Mar 28 comment Permutation with Natural Ordering I think your missing part of the question or i forgot to ask part of the question. What if they are requiring natural ordering only? So repetitions can occur Mar 28 accepted Permutation with Natural Ordering Mar 27 comment Permutation with Natural Ordering I still cannot seem to get the answer for Requires in order, but non unique. This one is hard, and the answer your giving me is incorrect. Given this, the solution says that k = 93 and n = 8 (where natural order matters and non-distinct) should be equal to (probability wize) k = 100 and n = 8 (natural order and distinctive) Mar 27 awarded Scholar Mar 27 comment Permutation with Natural Ordering Ill give you the answer, because you helped me with the first section! Thanks so much. Mar 27 comment Permutation with Natural Ordering If both order matters and repetitions are not allowed, the site says (TopCoder.com) 1/45 is the probability (given the example i gave you). I found the answer. Its ((k + n - 1) / (n - 1)). Mar 27 awarded Supporter Mar 27 comment Permutation with Natural Ordering The distinct case i am getting 45, which is the number that is provided on the solution, but the non-distinct case i am not getting the same answer. I get 36 (which they say the answer is 55). Mar 27 comment Permutation with Natural Ordering I am not to good at combinatorics. Does this mean the equation is, using the example data, ((10 - 2 + 1)! / 2!(10 - 2)!) ? I also do not know how to do sweet editing tricks like you do, i am new to the math.so! Mar 27 comment Permutation with Natural Ordering defined by the problem (i just read) (a,b) where a <= b. This is a problem off of TopCoder.com. I have never taken a probability class (or really learned anything about combanitorics). So i am very lost! But i did learn a lot more today by reading several online articles! Mar 27 awarded Editor Mar 27 comment Permutation with Natural Ordering I think it should be more english friendly now :) (I did not proof read and i did several section rewrites, i eventually got a mixture of like 4 different thoughts!) Mar 27 revised Permutation with Natural Ordering My first paragraph really made no sense. (I had to cut and paste it several times). Mar 27 comment Permutation with Natural Ordering Hi?... I do not know what to do with your comment :) Mar 27 asked Permutation with Natural Ordering