Suppоse yоur friend flips а fаir cоin, then... If the coin lаnds "Heads", they roll a 4-sided fair die If the coin lands "Tails", they roll an 8-sided fair die. Suppose they flipped the coin, then they rolled a 3 on the die. (They only told you the result of the die, not the coin.) Given this information, what is the conditional probability that their coin landed "Heads"?