The probability that the card you pick from a standard 52-card deck is 7/13.
Let's first solve how many cards out of the 52 are red.
Since half the deck is red and the other half is black, 1/2 of 52 is 26 cards.
Next, let's solve how many cards you can choose with seven on it.
Since there are four of each kind of card in a standard deck of cards, there are four sevens. However, we already counted the two red sevens when we solved how many red cards there are. So 4-2 = 2 cards.
26 + 2 = 28 cards
28/52 = 7/13.
