題組內容

4. Define S = {a, b, c, d, e). (20 pts)

(a) How many permutations are there to arrange a〜e in a row such that a and e are not together;

詳解 (共 1 筆)

鄭年芮

詳解 #4997097

2021/08/11

Total has _ _ _ _ _ ...

(共 198 字，隱藏中）

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