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Mathematics, 09.07.2021 23:00 hardyfombu

En una escuela todos los estudiantes reciben una de las cuatro calificaciones: A, B, C y D. Si 74 obtienen A, 2 obtienen B, 1/5 obtienen C y 20 alumnos reciben D.
¿Cuántos estudiantes hay en total en la escuela?

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En una escuela todos los estudiantes reciben una de las cuatro calificaciones: A, B, C y D. Si 74 o...
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