How many leaves on a tree diagram are needed to represent all possible combinations of tossing a coin and rolling a die?

To find the number of leaves on a tree diagram representing all possible combinations of tossing a coin and rolling a die, we consider the outcomes of each action. A coin has 2 outcomes (heads or tails), and a die has 6 outcomes (1 through 6). Therefore, the total number of combinations is (2 \times 6 = 12). Thus, the tree diagram would have 12 leaves, each representing a unique combination of the coin toss and die roll.