Question

2.3.3 quiz: two - way frequency tables
question 3 of 10
in a survey, 250 adults and children were asked whether they know how to swim. the survey data are shown in the relative frequency table.
what percentage of the people surveyed can swim?
a. 34%
b. 82%
c. 48%
d. 18%

Explanation:

Step1: Identify relevant relative - frequencies

We need to find the sum of the relative - frequencies of adults who can swim and children who can swim.
The relative - frequency of adults who can swim is 0.34 and the relative - frequency of children who can swim is 0.48.

Step2: Calculate the sum

$0.34 + 0.48=0.82$

Step3: Convert to percentage

To convert the decimal 0.82 to a percentage, we multiply by 100. So, $0.82\times100 = 82\%$

Answer:

B. 82%