I am sorry but being a newbie to Abstract Algebra, got interested in a question asked online about permutations of a group. I wanted to know the name of the book, but it seems the googling would not help. The image for the question being asked is at: https://ibb.co/e3aNNb
I would be highly thankful as the question seems nice for starting the topic for a beginner, and such question is not seen till now in any other book.
This question is from A Book of Abstract Algebra (second edition) by Charles C Pinter.
See Google books.