Based on a poll, 68% of internet users are more careful about personal information when using a public Wi-Fi hotspot. What is the probability that among four randomly selected internet users, at least one is more careful about personal information when using a public Wi-Fi hotspot? How is the result affected by the additional information that the survey subjects volunteered to respond?

Find: The probability that at least one of them is careful about personal information. Answer is 0.990

Question, How do I calculate this problem?

Answer:  How is the result affected by the additional information that the survey subjects volunteered to respond?