[問題] 條件機率
假設燈泡壽命 X 地機率密度函數為 f(x) = xe^-x,x > 0。
在時間1.5單位燈泡還沒壞掉的情況下,燈泡壽命可以超過
2時間單位的機率是多少? 設指數常數e = 2.718
煩請板上大大解惑,感恩!!
※ 編輯: superhaur 來自: 218.163.216.136 (04/17 00:40)
推
04/17 00:55, , 1F
04/17 00:55, 1F
推
04/17 01:09, , 2F
04/17 01:09, 2F
推
04/17 17:56, , 3F
04/17 17:56, 3F
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04/18 00:20, , 4F
04/18 00:20, 4F
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04/18 00:28, , 5F
04/18 00:28, 5F
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04/18 00:29, , 6F
04/18 00:29, 6F
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04/18 05:25, , 7F
04/18 05:25, 7F
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04/19 13:20, , 8F
04/19 13:20, 8F
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