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Mathematics, 15.08.2021 18:10 alicia234

90% des coureurs d'un marathon l'ont terminé avec succès. 30% de ces coureurs étaient des hommes. Combien de coureurs au total ont commencé le marathon si 270 hommes l'ont terminé ?

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90% des coureurs d'un marathon l'ont terminé avec succès. 30% de ces coureurs étaient des hommes. Co...
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