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(a) Une centre a une population de 35 femmes. Parmi cette population, 15 sont Indienne et 20 sont chinoise. Un chantillon de 2 femmes est

(a) Une centre a une population de 35 femmes. Parmi cette population, 15 sont Indienne et 20 sont chinoise. Un chantillon de 2 femmes est slectionn. Est-ce que l'evnement que la deuxime femme slectionne soit Indienne est indpendant de l'vnement que la premire soit Indienne?

(b) Supposons maintenant qu'il y ait 2000 femmes dans ce centre, dont 800 sont Indiennes et 1200 sont Chinoise. Un chantillon de 2 femmes est slectionn. Est-ce que l'vnement que la deuxime femme slectionne soit Indienne est indpendant de l'vnement que la premire soit Indienne?

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