问题如下:
In the incomplete probability matrix below, what is the joint probability of good economy and no interest rate increase?
选项:
A.10%.
B.20%
C.30%
D.40%
解释:
B is correct.
考点:Probability Matrix
解析:通过第一列利率提升的边际概率,得到C=10%。由此推得D=30%,B=50%。所以A=20%。
怎么推的B 和D呢,谢谢