刘同学2018-11-04 21:06:56
01.单选题 收藏 标记 纠错 As from the record of CFA Institute and GARP, the pass-through rate of CFA level I exam is 40%, and the pass-through rate of FRM exam is 50%. And as an investigation led by the two institutes, among the people who have passed the FRM, the pass-through rate of CFA level 1 exams is 60%. So what is the pass though rate of FRM members who has also passed the CFA level 1 exam before? 老师您好,如果用双树叉法计算,分子上(50%*60%)我可以理解,但是分母上为何不是(50%*60%+50%*40%)哪,有点懵圈,麻烦老师点拨
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杨知楠2018-11-05 14:10:59
这道题似乎不能用二叉树法计算,因为二叉树法好像是要求两个事件是互斥并且完备的,很显然考CFA和考FRM并不满足。
这个直接用贝叶斯公式就可以直接求出来了,在知道P(CFA)=40%, P(FRM)=50%,P(CFA l FRM)=60%的情况下,P(FRM l CFA)是可以算出来的,个人理解
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张玮杰2018-11-05 16:07:05
同学你好,这是贝叶斯公式,公式是P(A/B)=[P(B/A)/P(B)]×P(A)
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