Mathematics, 03.04.2020 21:44, Gaby702

A teacher has four books—A, B, C, and D—to assign to four students in any order he prefers. Set S includes all possible arrangements of the four books. Set X includes all possible arrangements when book C is chosen first and D is chosen second. Which notation is correct? If book C is chosen first and D is chosen second, in how many ways can the teacher assign the books?

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A teacher has four books—A, B, C, and D—to assign to four students in any order he prefers. Set S in...