<p>A fixed-income portfolio manager creates a contingency table
A fixed-income portfolio manager creates a contingency table of the number of bonds held in her portfolio by sector and bond rating. The contingency table is presented here:
The relative frequency of AA rated energy bonds, based on the total count, is closest to:
A.
10.5%.
B.
31.5%.
C.
39.5%.
正确答案是A