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A card is drawn randomly from a standard deck of cards. Determine the probability that the card drawn is a queen or a heart.(a) \(\frac{1}{4}\)(b) \(\frac{13}{56}\)(c) \(\frac{4}{13}\)(d) \(\frac{5}{52}\)I had been asked this question during an interview for a job.Query is from Discrete Probability topic in division Discrete Probability of Discrete Mathematics

Answer» CORRECT answer is (C) \(\frac{4}{13}\)

Easy explanation: LET M be the event that the card is a queen, and let N be the event that the card is a heart. Then SINCE there are 13 different ranks of cards in the deck, P(M) = \(\frac{1}{13}\) and since there are 4 suits in the deck, P(N) = \(\frac{1}{4}\). There is only one card that is both a queen and a heart, so P(M ⋂ N) = \(\frac{1}{52}\). Therefore, P(M U N) = \(\frac{1}{4} + \frac{1}{13} – \frac{1}{52} = \frac{16}{52} = \frac{4}{13}\).


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