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Mathematics, 30.03.2021 22:00 robert7248

En un salon de una academia solo asisten a un examen los 3/4 de los alumnos y de estos aprueban los 4/5 ; si los desaprobados son 21 ¿cuantos alumnos hay en dicha aula?

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En un salon de una academia solo asisten a un examen los 3/4 de los alumnos y de estos aprueban los...
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