In a survey, 1651 respondents say that they never use a credit card, 1234 say that they use it sometimes, and 2838 say that they use it frequently. What is the probability that a randomly selected person uses a credit card frequently? Is it unlikely for someone to use a credit card frequently? How are all of these results affected by the fact that the responses were obtained by those who decided to respond to a survey posted on the Internet?

Question

In a​ survey, 1651 respondents say that they never use a credit​ card, 1234 say that they use it​ sometimes, and  2838  say that they use it frequently. What is the probability that a randomly selected person uses a credit card​ frequently? Is it unlikely for someone to use a credit card​ frequently? How are all of these results affected by the fact that the responses were obtained by those who decided to respond to a survey posted on the​ Internet?