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標題:
Probabilities
發問:
2 cards are drawn randomly from a deck of 52 cards without replacement. Consider A = 1, J = 11, Q = 12, K =13. The probability to get a sum of 25 is
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最佳解答:
Only two possible arrangements are that selecting Q first and then K and selecting K first then Q. So P(get a sum of 25) = 4/52 * 4/51 * 2 = 8/663
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