[計量] 陳向東2題
1. The probability that event R will occur is 0.38
colA The probability that events R and W will both occur
colB 0.40
我選D
答案是B 解答說因為W發生機率最大為1，所以R&W同時發生"最大"機率為0.38*1<0.40
可是這不是最極端的狀況嗎
2. A certain five member committee must be assembled from a pool of five women
A ~ E and three men X ~ Z. What is the probability that the committee will
include B C E and Y Z ?
1 1
答案是(A)1/30 算法應該是 ----- * -----
C(5,3) C(3,2)
我的疑問是 這種算法感覺已經限制從第1群取3個 第2群取2個
感覺其他可能性都沒有考慮(ex: 取5,0 或取4,1)
可以幫我解答疑惑嗎 感謝!!
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◆ From: 58.114.221.213
※ 編輯: tping 來自: 58.114.221.213 (08/19 14:19)
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08/19 14:23, , 1F
08/19 14:23, 1F
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08/19 14:25, , 2F
08/19 14:25, 2F
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08/19 14:32, , 3F
08/19 14:32, 3F
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08/19 14:32, , 4F
08/19 14:32, 4F
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08/19 14:33, , 5F
08/19 14:33, 5F
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08/19 14:33, , 6F
08/19 14:33, 6F
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08/19 14:36, , 7F
08/19 14:36, 7F
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