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Exercice 4.4. Soit X le nombre de fumeurs dans une famille compose d'un mari et d'une femme. X est une variable aleatoire qui prend les

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Exercice 4.4. Soit X le nombre de fumeurs dans une famille compose d'un mari et d'une femme. X est une variable aleatoire qui prend les valeurs 0, 1, 2, avec les probabilites respectives de po, p1, p2. Le nombre moyen de fumeurs par famille est 0,63. 40% des familles contiennent au moins un fumeur. Trouver les probabilites po, p1 et p2

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