I have a question for practice:
Imagine that you know that your new neighbours have two children, but you don't know whether they are boys or girls or a boy and a girl. Then the mother says, in your hearing, "They were running a special promotion at the store for families with two boys, but we don't have two boys so we couldn't participate." What is the probability the two children are a boy and a girl?
Shouldn't the probability that they have a boy and a girl be 50% or.5? The question says to use a tree diagram but the tree diagram only leads to boy/girl or girl/girl, so 50% chance for either?