高中 機率
將四顆球任意分配到三個不透明的袋子，請小翰任選一袋，求選中的袋子裡有兩顆球的機率。
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推
07/15 15:07, , 1F
07/15 15:07, 1F
→
07/15 15:07, , 2F
07/15 15:07, 2F
→
07/15 15:08, , 3F
07/15 15:08, 3F
→
07/15 16:21, , 4F
07/15 16:21, 4F
→
07/15 16:21, , 5F
07/15 16:21, 5F
→
07/15 16:21, , 6F
07/15 16:21, 6F
→
07/15 16:32, , 7F
07/15 16:32, 7F
→
07/15 16:40, , 8F
07/15 16:40, 8F
推
07/16 11:19, , 9F
07/16 11:19, 9F
推
07/16 12:07, , 10F
07/16 12:07, 10F
→
07/16 14:36, , 11F
07/16 14:36, 11F
推
07/16 20:18, , 12F
07/16 20:18, 12F
→
07/16 20:47, , 13F
07/16 20:47, 13F
推
07/24 22:20, , 14F
07/24 22:20, 14F