Problem
52 cards in a deck. 4 kings and 4 aces in a deck. Draw a cardy pot it back, draw another. Find \( P \) (drawing a King and then drawing an Ace)
Solution
Step 1 ：\( P(King) = \frac{4}{52} \)
Step 2 ：\( P(Ace \mid King) = \frac{4}{51} \)
Step 3 ：\( P(King \cap Ace) = P(King) \times P(Ace \mid King) = \frac{4}{52} \times \frac{4}{51} \)
