Cell phones and surveys ii the survey by the national center for health statistics further found that 49% of adults ages 25–29 had only a cell phone and no landline. we randomly select four 25–29-year-olds: a. what is the probability that all of these adults have a only a cell phone and no landline? b. what is the probability that none of these adults have only a cell phone and no landline? c. what is the probability that at least one of these adults has only a cell phone and no landline?

(a) The probability that all of these adults have a only a cell phone and no landline is

(b) The probability that none of these adults have only a cell phone and no landline is .

(c) The probability that at least one of these adults has only a cell phone and no landline is .

According to the question, the survey by the national center for health statistics found that 49% of adults ages 25–29 had only a cell phone and no landline.

Probability that adults ages 25–29 had only a cell phone and no landline is

Probability that adults ages 25–29 have only a cell phone and no landline is

On selection of random 4 persons aged between 25–29-

(a) probability that all of these adults have a only a cell phone and no landline is

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

(c) the probability that at least one of these adults has only a cell phone and no landline is .

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