Question 529905
If a single card is drawn from a standard 52-card deck, what is the probability that it is either a seven or a spade? 
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P(7 or spade) = P(7) + P(spade) - P(7 and spade)
= 4/52 + 13/52 - 1/52 = 16/52 = 4/13
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Cheers,
Stan H.