Among 21- to 25-year-olds, 29% say they have driven while under the influence of alcohol. suppose that three 21- to 25-year-olds are selected at random. source: u. s. department of health and human services, reported in usa today (a) what is the probability that all three have driven while under the influence of alcohol? (b) what is the probability that at least one has not driven while under the influence of alcohol? (c) what is the probability that none of the three has driven while under the influence of alcohol? (d) what is the probability that at least one has driven while under the influence of alcohol?