The original clipping from Parade Magazine (1990, September 9'th edition -- Marilyn vos Savant's "Ask Marilyn" column) that stumped 1,000 PhDs and even Paul Erdős was unconvinced of the right answer until shown computer simulations. This problem is a paradox of the veridical type
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I found that anyone that understood math at a college level, I mean really understood, would get this question right. It was the "fuzzies' (humanities majors) that got it wrong. So rather surprising that Erdos didn't get it.
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