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. De un total de 60 alumnos del primer curso del I. B. Todoestudiado: 15 estudian solamente ruso, 11 estudian ruso e ingls, 12 estudian

. De un total de 60 alumnos del primer curso del I. B. Todoestudiado: 15 estudian solamente ruso, 11 estudian ruso e ingls, 12 estudian slo alemn; 8 estudian ruso y alemn; 10 estudian slo ingls; 5 estudian ingls y alemn; y 3 los tres idiomas. Determina: a) Cuntos no estudian ningn idioma? b) Cuntos estudian alemn? c)

Cuntos estudian slo alemn e ingls? d) Cuntos estudian ruso?

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