Re: [情報]2014年年度NBA推特人物-Manu Ginobili已回收
通通閃開 讓哥專業的來教你們吧
題目分析如下
我的手上有3張卡, 1張正反面都是黑色,
1張正反面都是銀色, 最後1 張則是一面黑色, 一面銀色.
這時 Timmy 走進休息室準備出外吃午餐. 我跟他打賭,
Ⅰ 假使我現在這三張抽了一張卡, 其中一面是銀色,
ansⅠ: 3/6=1/2 六面中有三面是銀色的
Ⅱ (假使我現在這三張抽了一張卡) 有多少機會另外一面也是銀色的?
(翻譯米糕:兩面都是銀色的)
ansⅡ: 1/3 bj4 三張中有一張兩面是銀色的
Ⅲ 假使我現在這三張抽了一張卡, 其中一面是銀色,
有多少機會另外一面也是銀色的?
ansⅢ: (1/3) / (1/2) = 2/3
別再用錯誤的分析來得到錯誤的答案誤導大家了
樹狀圖救援
Ⅰ Ⅱ Ⅲ
A銀 C銀 E黑
B銀 D黑 F黑
Ⅰ Ⅱ Ⅲ
已經看的第一面: A B C D E F
B A D C F E
v v v o
1/2派的是多了o這個可能
如果對方兩面都看過了再來問你...
哼哼 這人一定是個老千
翻開來另一面可能不是黑也不是銀 而是你的裸照
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04/11 15:59, , 1F
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04/11 16:49, , 28F
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04/11 17:54, 50F
※ 編輯: funkie (61.228.61.35), 04/11/2014 17:58:36
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04/11 18:03, , 51F
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04/11 19:30, , 63F
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04/12 10:52, , 67F
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