You are dealt one card from a 52-card deck. Find the probability that you are dealt a seven or a red card.
To find the probability that you are dealt a seven or a red card, you need to find the number of favorable outcomes and divide it by the number of possible outcomes.
Number of favorable outcomes: There are 4 sevens in a deck (hearts, diamonds, clubs, spades) and 26 red cards (13 hearts, 13 diamonds) in total. However, one of the sevens (7 of diamonds) is already counted in the red cards. So the number of favorable outcomes is 4 + (26 - 1) = 29.
Number of possible outcomes: There are 52 cards in a deck, so the number of possible outcomes is 52.
Probability = Number of favorable outcomes / Number of possible outcomes = 29 / 52.
Therefore, the probability that you are dealt a seven or a red card is 29/52, which can be simplified to 7/13.