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1.- De 10 obreros, 6 pertenecieron al sindicato por ms de 7 aos. Si de este grupo de 10 se eligen aleatoriamente 5 obreros. A)

1.- De 10 obreros, 6 pertenecieron al sindicato por ms de 7 aos. Si de este grupo de 10 se eligen aleatoriamente 5 obreros. A) Escribe y determina las variables. B)cul es la probabildiad de que exactamente 3 de ellos tengan una antigedad de ms de 7 aos.

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