Question: For a recent year, 51% of the families in the United States had no children under the age of 18; 20% had one child; 19% had two children; 7% had three children; and 3% had four or more children. If a family is selected at random, find the probability that the family has

a. Two or three children

b. More than one child

c. Less than three children

d. Based on the answers to parts a, b, and c, which is most likely to occur? Explain why.