SOLUTION: John surveyed a group of people about their knowledge of rats. To the nearest tenth of a percent, he found that 86.8% of the people surveyed thought rats
carried diseases. Of the
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Question 33324: John surveyed a group of people about their knowledge of rats. To the nearest tenth of a percent, he found that 86.8% of the people surveyed thought rats
carried diseases. Of the people who thought rats carried diseases,45.7% said that rats frequently carried rabies. Since rats do not frequently carry rabies these 21 people were mistaken. HOw many total people did john survey?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Let number of people surveyed be "x".
Then # who thought rats carried deseases = 0.86x
And 0.457(0.86) said rats frequently carried rabies
EQUATION:
number who thought rats frequently carried rabies = 21
0.457(0.86x)=21
x= 53.43...
Number of people surveyed was 54
Cheers,
Stan H.
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