A 2015 survey by the National Center for Health Statistics found that

71%

of adults ages

25-29

had only a cell phone and no landline. This raises concerns about the accuracy of certain surveys, as they depend on random-digit dialing to households via landlines. Researchers randomly select

six

25-29-year-olds.

Complete parts a through c.

b) What is the probability that none of these adults have only a cell phone and no landline?