.
= = 27720 different arrangements in a linear string,
and of this number, i.e. = 2310 for the circular wreath.
Solved.
--------------
See the lessons
- Arranging elements of sets containing indistinguishable elements
- Persons sitting around a cicular table
in this site.
Also, you have this free of charge online textbook in ALGEBRA-II in this site
- ALGEBRA-II - YOUR ONLINE TEXTBOOK.
The referred lessons are the part of this online textbook under the topic "Combinatorics: Combinations and permutations".
Save the link to this textbook together with its description
Free of charge online textbook in ALGEBRA-II
https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson
into your archive and use when it is needed.