#### Answer

25.6 million females 18 years old and older are widowed or divorced.
91.8 million females 18 years old and older are married, widowed, or divorced.

#### Work Step by Step

Set $A$ is the females 18 years old and older who are married, set $B$ is the females 18 years old and older who are widowed, and set $C$ is the females 18 years old and older who are divorced.
The first question asks for the union of sets $B$ and $C$
Using the Counting Formula for sets:
$n(B\cup C)=n(B)+n(C)-n(B\cap C)$
According to the survey, there isn't anybody who is both widowed and divorced; therefore, $n(B\cap C)=0$
$n(B\cup C)=11.2+14.4-0=25.6$
25.6 million females 18 years old and older are widowed or divorced.
The second question asks for the union of sets $A$, $B$, and $C$.
Using the Counting Formula for sets:
$n(A\cup B\cup C)=n(A)+n(B+n(C)-n(A\cap B)-n(B\cap C)-n(A\cap C)+n(A\cap B\cap C)$
According to the survey there isn't anybody who is in either intersection of these sets; therefore:
$n(A\cup B\cup C)=n(A)+n(B+n(C)-n(A\cap B)-n(B\cap C)-n(A\cap C)+n(A\cap B\cap C)=66.2+11.2+14.4-0-0-0+0=91.8$
91.8 million females 18 years old and older are married, widowed, or divorced.