NO.PZ2017092702000066
问题如下：
Which of the following best describes how an analyst would estimate the expected value of a firm under the scenarios of bankruptcy and survivorship? The analyst would use:
选项：
A.the addition rule.
B.conditional expected values.
C.the total probability rule for expected value.
解释：
C is correct.
The total probability rule for expected value is used to estimate an expected value based on mutually exclusive and exhaustive scenarios.
本题涉及如果未来只有破产和不破产这两种情况下，如何计算公司的expected value。那么全概率公式来解决就即可。
我一开始选b是因为我以为surviorship是破产情况下能留存下来的可能，意思是surviorship和破产两个mutually exclusive吗
