How many ways can the 3 potted plants be arranged in a row?, 3, 4, 6, How many ways can 5 books be arranged in a shelf?, 120, 50, 25, In how many ways can the butterflies be arranged in a row?, 120, 720, 5040, How many ways can this group of friends sit in a row?, 36, 720, 320.

Permutation

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？