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En una empresa de inversiones se sabe que el 30% de los empleados son Ingenieros comerciales, otros 30% son economistas, adems el 65% de los

En una empresa de inversiones se sabe que el 30% de los empleados son Ingenieros comerciales, otros 30% son economistas, adems el 65% de los economistas y el 45% de los Ingenieros comerciales, son corredores de la bolsa de comercio, mientras que del resto unicamente el 25% desarrolla esta labor. Determinar:

a. Si la persona seleccionada se dedica al corretaje en la bolsa de comercio, determine la probabilidad de que sea economista.

b. Si se escogen al azar a 5 empleados de la empresa de inversiones, cul es la probabilidad de que a lo ms 3 de ellos no sean corredores de la bolsa de comercio?

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