~/math / Conditional probability
At least one girl
mediumA family has two children. You learn that at least one of them is a girl. What is the probability that both are girls? (Each child is independently a girl or a boy with probability ½.)
~/math / Conditional probability
A family has two children. You learn that at least one of them is a girl. What is the probability that both are girls? (Each child is independently a girl or a boy with probability ½.)