gigizhakie gigizhakie

24-03-2024
Mathematics

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De un grupo de 120 alumnos, 70 prefieren los cursos "A" o "B" pero no ambos cursos a la vez. Los que no prefieren ninguno de dichos cursos, son el cuádruple de los que prefieren ambos cursos. ¿Cuántos alumnos prefieren ambos cursos?

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