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Un article trouvé pour ce sujet.
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Instant Winner |
1999-04-07 |
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FSSTAN pose la question :
The probabilities of being an "instant winner" of $25 or $50 in a lottery are 1/600 and 1/1200, respectively. The mathematical expectation of being an "instant winner" of $25 or $50 is?
Jack LeSage and Penny Nom lui répond. |
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