in a survey, 250 adults and children were asked whether they know how to swim. the survey data are shown in…

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.\n| | can swim | cannot swim | total |\n|--|--|--|--|\n| adults | 0.34 | 0.06 | |\n| children | 0.48 | 0.12 | |\n| total | | | |\nwhat percentage of the people surveyed are adults?\na. 6%\nb. 40%\nc. 34%\nd. 82%

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.\n| | can swim | cannot swim | total |\n|--|--|--|--|\n| adults | 0.34 | 0.06 | |\n| children | 0.48 | 0.12 | |\n| total | | | |\nwhat percentage of the people surveyed are adults?\na. 6%\nb. 40%\nc. 34%\nd. 82%

Answer

Explanation:

Step1: Find the relative - frequency of adults

The relative - frequency of adults who can swim is 0.34 and the relative - frequency of adults who cannot swim is 0.06.

Step2: Calculate the total relative - frequency of adults

To find the total relative - frequency of adults, we add the relative - frequencies of adults who can swim and adults who cannot swim. So, (0.34 + 0.06=0.4).

Step3: Convert the relative - frequency to a percentage

To convert 0.4 to a percentage, we multiply by 100. (0.4\times100 = 40%).

Answer:

B. 40%