Step-by-step explanation:
If you're randomly selecting a three-child family with either one or two girl children, there are various possible combinations of children within such a family. The children can be boys (B) or girls (G). Here are some possible combinations:
1. GGB (Two girls, one boy)
2. GBG (One girl, one boy, one girl)
3. BGG (One boy, two girls)
These are the three possible combinations for a three-child family with either one or two girl children, assuming that the gender of each child is independent and equally likely.