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Pregunta 2 8.8 pts El tiempo de reemplazo de los reproductores de CD se distribuye normalmente, con una media de 7.2 ahos y una

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Pregunta 2 8.8 pts El tiempo de reemplazo de los reproductores de CD se distribuye normalmente, con una media de 7.2 ahos y una desviaci6n estndar de 1.5 afios. Cul es la probabilidad de que el tiempo de reemplazo sea menor a 6.9

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