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【OG20-P180-221题】
Xavier, Yvonne, and Zelda each try independently to solve a problem. If their individual probabilities for success are 1/4,1/2,5/8, respectively, what is the probability that Xavier and Yvonne, but not Zelda, will solve the problem?
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X: 1/4
Y:1/2
Z:5/8
X+y成功解决问题的可能性:
Xy成功的几率(1/4*1/2)(1-5/8)=3/64
三个人是一起解题的,不能某一个不解题,所以钱两个成功的概率还需要跟z不成功的概率一起算
题目讨论 (2条评论)

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Hylian
ZELDA 233333
0
0 回复 2018-10-06 16:55:01
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默默
两个人各自成功的几率
0
0 回复 2018-05-10 05:34:04