Formulas for Permutation and Combination??

Hi All,
I got a requirement to develop a Simulator for a chemical process.. In which ther will be some inputs given by the user for a process.. the output must be Optimus result or best result...
I need to know.. is ther any standard for using Permutation and Combinations..
Also is ther any feature to develop a simulation process??
Thanks and Regards
Aravindh Mani

hi,
_*FORMULA*_
Permutation = nPr = n! / (n-r)!
Combination = nCr = nPr / r!
where,
              n, r are non negative integers and r<=n.
              r is the size of each permutation.
              n is the size of the set from which elements are permuted.
              ! is the factorial operator.
Example:
Example:Find the number of permutations and combinations: n=6; r=4.
Step 1: Find the factorial of 6.
            6! = 6×5×4×3×2×1 = 720
Step 2: Find the factorial of 6-4.
            (6-4)! = 2! = 2
Step 3: Divide 720 by 2.
            Permutation = 720/2 = 360
Step 4: Find the factorial of 4.
            4! = 4×3×2×1 = 24
Step 5:Divide 360 by 24.
            Combination = 360/24 = 15
The above example will help you to find the Permutation and Combination manually.
hope this helps
Regards
RItesh J

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Permutations and combinations

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i have a very urgent requirement.
we have company codes from 1000 to 9999. ok
these company codes are divided series wise according to different schemes
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like 100A 100B ..100z.......999a .....999z.
so my question is howmany combinations are possible and what are they
from 1000 to 9999 using alphabets (only unique plz)ABCDEFGHIJKLMNOPQRSTUVWXYZ.
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king solomon

Taufiq wrote:
I need help with the following. I have an input character array of {'a', 'b'}. My output should be a string array of {"a", "b", "aa", "ab", "ba", "bb"). Is this factorial, permutation or combination? How should I approach this problem? Can anybody show me an efficient method to do so? Thank you.It's an interesting problem. If you replace 'a' and 'b' with the binary digits 0 and 1 you see that first you generate all numbers with one binary digit and then all possible numbers with 2 binary digits, like
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00
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Problem when i execute with debugger value are coming in my ITAB i-e GI_DETAIL but not displaying in my formula.I can't understand what is the problem in the code.
Thanks,
abapfk

HI
before reading the table first check, it is balnk or not.
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check in debugging whther the values coming correctly or not.
I hope this will work for you.
Thanks
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passcategory
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passcategory3    (percentage) 20 (38.46)    21    (28.37) 41(33.41)
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the individual percentage of girls and boys in single column...so that i can place in gender column in tablix..and i can retrieve individual percentgaes of girls and boys seperately as shown in output..
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lucky

please reply..its urgent
Here is a tip: if you want to tick off people from helping you, you should absolutely include "urgent" in your post. That's a good way to encourage people to move to the next post. I did see this one earlier today, but did not have the time.
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And for that matter that "totals" column?
Erland Sommarskog, SQL Server MVP, [email protected]

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