A standard deck of playing cards has four suits in two colors: diamonds and hearts are red; clubs and spades are black. Each suit has 13 cards: an ace, the numbers two through ten, a jack, a queen, and a king.
Gustavo decided to play a card game with his friend, Brandon. He told Brandon that if he picked a black card with a value of nine or greater, Brandon would win. (Jack, Queen, and King are considered to be greater than nine.) What is the probability that Brandon will win?
Please simplify the fraction.