To determine the percentage of people surveyed who can swim, we need to follow these steps:
1. Identify the relative frequencies for adults and children who can swim:
- From the table, the relative frequency of adults who can swim is [tex]\(0.34\)[/tex].
- The relative frequency of children who can swim is [tex]\(0.48\)[/tex].
2. Calculate the total relative frequency of people who can swim:
- To find the total relative frequency of people who can swim, simply add the relative frequencies of adults and children who can swim:
[tex]\[
0.34 + 0.48 = 0.82
\][/tex]
3. Convert the relative frequency to a percentage:
- To convert the total relative frequency to a percentage, multiply by 100:
[tex]\[
0.82 \times 100 = 82\%
\][/tex]
Thus, the percentage of people surveyed who can swim is [tex]\(\boxed{82\%}\)[/tex]. The correct answer is:
D. [tex]\(82\%\)[/tex]
