Question: According to a survey cited in Newsweek, 29.7% of married survey respondents who were married between the ages of 20 and 22 (inclusive), 26.9% of those married between the ages of 23 and 27, and 45.1% of those married at age 28 or older said that "their marriage was less than ‘very happy'." Suppose that a survey respondent from each of the three age groups was selected at random. What is the probability that all three respondents said that their marriage was "less than very happy"?