NO.PZ2018070201000066
问题如下：
The return projections have been made by Eunice. an analyst from an investment company, for each of the assets with the same probability of occurrence, which two assets are perfectly negatively correlated?
选项：
A.Asset A and Asset B.
B.Asset A and Asset C.
C.Asset B and Asset C.
解释：
C is correct.
Asset B and Asset C have returns that are the same for Outcome 2, but the exact opposite returns for Outcome 1 and Outcome 3; therefore, because they move in opposite directions at the same magnitude, they are perfectly negatively correlated.
We can also use the calculator to measure the correlation. The correlation between asset B and asset C is -1, so perfectly negatively correlated.
老师，我按照说明按了计算器，最后算出来r=-0.2，试了好几次都是这个数字
