Two dice, told at least one is a four
You roll two fair dice out of sight. A friend peeks and tells you, truthfully, that at least one of the two dice shows a 4.
Given that, what is the probability that both dice show a 4?
You roll two fair dice out of sight. A friend peeks and tells you, truthfully, that at least one of the two dice shows a 4.
Given that, what is the probability that both dice show a 4?