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En una competencia de carrera se analiza el tiempo de duracin que los participantes toman para llegar a la meta, y se concluye que dichos

En una competencia de carrera se analiza el tiempo de duracin que los

participantes toman para llegar a la meta, y se concluye que dichos tiempos estn

distribuidos normalmente. Si el tiempo promedio de duracin de la carrera es de 50

minutos con una varianza de 25 minutos; asumiendo que el total de participantes es de

80 personas:

a) Cuntas personas requerirn un tiempo menor a 45 minutos y mayor a 53 minutos

para finalizar la carrera?

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