问题如下：
Suppose that the annual profit of two firms, one an incumbent (Big Firm, X1) and the other a startup (Small Firm, X2), can be described with the following probability matrix:
What is the conditional distribution of Small Firm’s profits if Big Firm has a $100M profit year?
选项：
解释：
The conditional distribution is just the row corresponding to USD 100M normalized to sum to 1. The conditional is different from the marginal, which is another demonstration that the profits are not independent.
当大公司profit是100M的时候，小公司的收益的各种情况的概率。不就是表格中的0% 及那几个概率吗？ 没看懂题目的意思，从什么角度分析
