You are dealt one card from a 52-card deck. Find the probability that you are dealt a three or a red card.

There are 4 threes in a deck, and there are 26 red cards in a deck. However, there is one red three that is counted in both groups. So, the total number of cards that are either a three or a red card is 4 + 26 - 1 = 29.

The probability of being dealt a three or a red card is then 29/52 = 0.5577, or approximately 55.77%.