There are many questions in this website asking for finding number of arrangements under different constraints. All of them are similar, but sometimes different approaches are needed for these problems.

I have now answered some of them with the help of a tool and added to community wiki. Some of these questions which I answered using the tool are given below. There are many such questions available
Question 3
Question 4

Is it good if I answer more questions using this tool by adding to community wiki because after some days, I may end up in adding many such answers because these questions are appearing very frequently.

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    $\begingroup$ I don't quite understand what you're doing. In Question 1, you didn't answer someone's question, you posted a question and then included the answer in the body of the question. I'm not sure what that's meant to accomplish. $\endgroup$ – Gerry Myerson Dec 24 '16 at 21:17
  • $\begingroup$ sorry, question 1 and 2 was a wrong examples. I was trying to verify whether this tool gives right answers. Later, using some python script I got, I found that the tool was right and then I answered some other questions using this tool. kindly see question $3,4$ (edited question) $\endgroup$ – Kiran Dec 24 '16 at 21:22
  • $\begingroup$ I believe you are trying something novel in good faith, but it seems to make a point of tying solutions to the linked tool for generating exercises. Your small sample does not demonstrate convincingly that such semi-automated posts are capable of providing the best content for Math.SE. $\endgroup$ – hardmath Dec 26 '16 at 3:34

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