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El tiempo promedio que emplea un suscriptor de The Wall Street Journal en leer esa publicacin es de 49 minutos (The Wall Street Journal, Estudio

El tiempo promedio que emplea un suscriptor de The Wall Street Journal en leer esa publicacin es de 49 minutos (The Wall Street Journal, Estudio de Suscriptores, 1996). Suponga que la desviacin estndar es de 16 minutos, y que los tiempos de lectura tienen distribucin normal.

Cul es la probabilidad de que un suscriptor no tarde ms de 30 minutos en leerla?

Cul es la probabilidad de que un suscriptor tarde cuando menos 1 hora en leer la publicacin?

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