Based on apoll, 64% of Internet users are more careful about personal information when using a publicWi-Fi hotspot. What is the probability that among three randomly selected Internetusers, at least one is more careful about personal information when using a publicWi-Fi hotspot? How is the result affected by the additional information that the survey subjects volunteered torespond?

The probability that at least one of them is careful about personal information is ?

(Round to three decimal places asneeded.)