Problème de maths:
Lors d'un concert 1/5du public à moins de 15 ans,1/3 à entre 15et20 ans,3/7 du reste à entre 20et 30 ans et 380 spectateur sont âgés de plus de 30 ans.
1-Quelle est la proportion du public qui a entre 20 et 30 ans?

By: USER7528
27 Agustus 2025 mathematiques 5 minutes
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Question

Grade: Education Subject: mathematiques
Problème de maths:
Lors d'un concert 1/5du public à moins de 15 ans,1/3 à entre 15et20 ans,3/7 du reste à entre 20et 30 ans et 380 spectateur sont âgés de plus de 30 ans.
1-Quelle est la proportion du public qui a entre 20 et 30 ans?
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Answer (247)

Best Answer
(74)
3 personne sur 7 alors dans 100 combien?regle de 3 donc tu fais 100*3/700
Answered on 27 Agustus 2025

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