Let the deck consist of 52 cards (13 of each suit). Find the probability that none of the four drawn cards is a spade: (39/52)*(38/51)*(37/50)*(36/49) = 0.3038...

The probability that at least one of the four cards is a spade equals 1 - 0.3038 = 0.6962.

Mar 21st, 2015

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