Question 1175904
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This problem came SEVERAL TIMES to the forum during last couple of weeks.


an I just solved it several times.



See my solution under this link


<A HREF=https://www.algebra.com/algebra/homework/Permutations/Permutations.faq.question.1175421.html>https://www.algebra.com/algebra/homework/Permutations/Permutations.faq.question.1175421.html</A>


https://www.algebra.com/algebra/homework/Permutations/Permutations.faq.question.1175421.html




It looks like your solution is correct, but it goes with no explanations, so . . . 


So learn from my referred post, with full explanations.