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Un article trouvé pour ce sujet.
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Forty balls are placed in a bag |
2004-06-19 |
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Sheila pose la question :
Forty balls numbered 1-10 are placed in a bag and four are drawn at random. What is the probability that the first ball drawn is between 1-10 (inclusive) the second is between 11-20, the third is between 21-30 and the last is between 31-40?
Penny Nom lui répond. |
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