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Fw: [問卦] NBA板的數學題目
[ Math ]8 留言, 推噓總分: +3
作者: e1q3z9c7 - 發表於 2014/04/11 23:06(10年前)
27Fykes60513:2/3 這在某本仿福爾摩斯的數學科普書有介紹過04/11 16:28
70Fykes60513:你只知道抽到一面銀 那張是銀銀卡的機會大還是銀黑卡?04/11 16:35
73Fykes60513:這樣想就知道為什麼答案不是1/204/11 16:36
85Fykes60513:用條件機率算 抽到單面銀的機率是1/2 雙面銀的機會是1/304/11 16:39
86Fykes60513:一除就是2/3 就這樣而已...04/11 16:40
119Fykes60513:真麻煩 我改一下題目好了 "鬼禿從這三張卡中抽出一張04/11 16:47
121Fykes60513:但只抽出一半 看到露出銀色 這張是銀銀卡的機率是多少?"04/11 16:48
125Fykes60513:這樣沒有文意問題了吧...04/11 16:49
128Fykes60513:1/4啊 W大04/11 16:50
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