問一題 exam p sample Q136 - 金融分析師

By Zora
at 2008-12-31T22:22
at 2008-12-31T22:22
Table of Contents
最近做到 Exam P 的 sample 的 第 136 題
A fair die is rolled repeatedly.
Let X be the number of rolls needed to obtain a 5 and
Y the number of rolls needed to obtain a 6.
Calculate E(X|Y=2)= ?
解 答: 6.6
知道是用幾何分配的觀念
但看詳解也看不出所以然
所以相請問版上有考過P的前輩們能夠幫忙解惑一下
如果能提供另外的作法就更感謝了
謝謝~~
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金融分析師
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