A card is drawn from a well-shuffled deck of 52 cards. find the probability that the card is a red card or a 10.

Total number of cards = 52

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Find total number of red card or a 10:

Total number of cards that are red = 26

Total number of cards that are 10 but not red = 2

Total number of cards that are red card or 10 = 26 + 2 = 28

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P (red card or a 10) = 28/52 = 7/13

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Answer: 7/13