Description for Correct answer:
Total number of cards = 52
Total number of red cards = 26
Total number of kings = 4
But 2 red cards are also kings,
So probability = \( \large\frac{26}{52} + \frac{4}{52} - \frac{2}{52} = \frac{26 + 4 - 2}{52} = \frac{28}{52} = \frac{7}{13} \)