[中學] 排列組合的題目
做題目的時候遇到的,可能太久沒接觸,怎麼算就是不知道答案怎麼得出來的。
題目如圖:
https://goo.gl/0vDqjD
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08/16 12:27, , 1F
08/16 12:27, 1F
→
08/16 12:28, , 2F
08/16 12:28, 2F
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08/16 12:29, , 3F
08/16 12:29, 3F
推
08/16 15:41, , 4F
08/16 15:41, 4F
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08/16 16:09, , 5F
08/16 16:09, 5F
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08/16 16:10, , 6F
08/16 16:10, 6F
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08/16 18:50, , 7F
08/16 18:50, 7F
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08/16 21:16, , 8F
08/16 21:16, 8F
→
08/16 21:16, , 9F
08/16 21:16, 9F
→
08/16 21:17, , 10F
08/16 21:17, 10F
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08/16 21:17, , 11F
08/16 21:17, 11F
→
08/16 21:18, , 12F
08/16 21:18, 12F
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08/16 21:45, , 13F
08/16 21:45, 13F
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08/16 21:45, , 14F
08/16 21:45, 14F
→
08/16 21:45, , 15F
08/16 21:45, 15F
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08/16 23:14, , 16F
08/16 23:14, 16F
推
08/17 09:45, , 17F
08/17 09:45, 17F