Answer: a) Labor force participation rate = 72.46%, b) Unemployment rate = 1.8%.
Explanation:
Since we have given that
Number of people who have at least a bachelor's degree = 71.9 millions
Number of people who were employed = 52.1 millions
Number of people who were unemployed = 1.3 millions
So, Labor- force participation rate would be
![(Employed)/(Total)* 100\\\\=(52.1)/(71.9)* 100\\\\=72.46\%](https://img.qammunity.org/2020/formulas/mathematics/high-school/6pudec2kcel1asnibtzbx1k79sahp5h5at.png)
Unemployment rate for this group would be
![(Unemployed)/(total)* 100\\\\=(1.3)/(71.9)* 100\\\\=1.8\%](https://img.qammunity.org/2020/formulas/mathematics/high-school/risqt9j3c2cemw9noxp6f55wl271puiorw.png)
Hence, a) 72.46%, b) 1.8%.