A little probability brain teaser for all of you… I was given this last week and I’m still having problems working out what the answer is!
A family has 2 children. When you knock on the door one of the children, a boy, opens the door. What is the probability that the other child is a boy?
I’ve got an answer in my head but I can’t quite figure out which one is correct so it would be great to hear your thoughts on what you think the answer is!