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EJERCICIO 1: La cantidad de horas que dedican los estudiantes del ITSZ-on line, a estudiar semanalmente sigue una distribucin normal, con media de 20 y

EJERCICIO 1: La cantidad de horas que dedican los estudiantes del ITSZ-on line, a estudiar semanalmente sigue una distribucin normal, con media de 20 y desviacin estndar de 4.

Calcular:

a) La probabilidad de que un alumno estudie al menos 15 horas semanales.

b) La probabilidad de que un alumno estudie entre 15 y 25 horas semanales.

c) La probabilidad de que un alumno estudie menos de 8 horas semanales.

Valor de este ejercicio: 2 puntos

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