We draw a card from a standard deck. What is the probability that it is a Jack, Queen, King, or it is red?
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The probability of J/Q/K is 1/13, and the probability of red is 1/4, so the probabilit of J/Q/K/red is 1/13 + 1/4 = 17/52.
There are 4 of each: jack, queen, king. This is a total of 12. There are 13 red cards in a deck total, however, three of them are already counted. Adding it up, you get 22/52, or 11/26
