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标题: OG 231,成功概率的题目,请帮忙看一下好吗? [打印本页]

作者: 蓝色的小猫 时间: 2007-1-3 07:37 标题: OG 231,成功概率的题目,请帮忙看一下好吗?

231. X.Y.Z each try independently to solve a problem. If their individual probabilities for success are 1/4,1/2,and 5/8, respectively, what is the probabililty that X,Y but not Z, will slove the problem?

the correct answer is 3/64. WHY? Many Thanks if anybody can help me!!!

作者: georgeqian 时间: 2007-1-3 20:14

1/4*1/2*（1-5/8）=3/64

作者: 蓝色的小猫 时间: 2007-1-5 20:21

原来如此,万分感谢!!!

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