Question: In 1991, 72% of children in the United States were living with both parents, 22% were living with mother only, 3% were living with father only, and 3% were not living with either parent (World Almanac and Book of Facts, 1993, p. 945). What is the expected value for the number of parents a randomly selected child was living with? Does the concept of expected value have a meaningful interpretation for this example? Explain.