Suppose that each child born is equally likely to be a boy (B) or a girl (G). Consider a family with exactly two children Draw a possibility tree and list all the elements in the sample space whose...

Suppose that each child born is equally likely to be a boy (B) or a girl (G). Consider a family with exactly two children

• Draw a possibility tree and list all the elements in the sample space whose outcomes are all possible genders of the two children.


• 
  
  Find the probability of the event that at least one child is a girl.