If two cards are drawn from a pack of 52 well-shuffled playing cards, what is the probability of getting (1) exactly one face card, (2) at least one face cards, (3) one specific face card?
There are 52 cards in a well-shuffled playing card deck. If we draw two cards without replacement, there are a total of (52 choose 2) = 1,326 possible outcomes.
- To get exactly one face card, we can choose one of the 12 face cards in the deck and one of the 40 non-face cards. There are (12 choose 1) ways to choose one face card and (40 choose 1) ways to choose one non-face card. The total number of ways to choose two cards is (52 choose 2). Therefore, the probability of getting exactly one face card is:
(12 choose 1) * (40 choose 1) / (52 choose 2) ≈ 0.442
- To get at least one face card, we can calculate the probability of getting no face cards and subtract it from 1. The probability of getting no face cards is:
(40 choose 2) / (52 choose 2) ≈ 0.703
Therefore, the probability of getting at least one face card is:
1 - (40 choose 2) / (52 choose 2) ≈ 0.297
- To get a specific face card, we can choose one of the four cards of that rank and one of the 48 non-matching cards. There are (4 choose 1) ways to choose the specific face card and (48 choose 1) ways to choose a non-matching card. The total number of ways to choose two cards is (52 choose 2). Therefore, the probability of getting a specific face card is:
(4 choose 1) * (48 choose 1) / (52 choose 2) ≈ 0.059
Note that the probabilities are approximate due to rounding.
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