A standard pack of cards (consists of 26 red cards and 26 black cards) is shuffled, and the dealer deals out one card to you at a time. At any point, after seeing the first n cards, you may exclaim: "the next card will be red!" Devise a strategy for making your guess about when the next card will be red. What is your probability for being correct? Prove it is the optimal strategy.
Please help me. I'm really confused! Thanks! 
