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1) The university library purchased books on macroeconomics, microeconomics and statistics. She devoted €500 to the purchase of macroeconomics books (unit price €50), €1000 to the purchase of microeconomics books (unit price €50) and €500 to the purchase of statistics works (unit price €25). The average price of a work is: (A) €40 (b) €38 (c) €35 (d) €41.6

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Answer to a math question 1) The university library purchased books on macroeconomics, microeconomics and statistics. She devoted €500 to the purchase of macroeconomics books (unit price €50), €1000 to the purchase of microeconomics books (unit price €50) and €500 to the purchase of statistics works (unit price €25). The average price of a work is: (A) €40 (b) €38 (c) €35 (d) €41.6

Expert avatar
Sigrid
4.5
116 Answers
Pour connaître le prix moyen d’une œuvre, il faut calculer la dépense totale en livres et la diviser par le nombre total de livres achetés. La bibliothèque universitaire a dépensé : 500 € sur les livres de macroéconomie 1000 € sur les livres de microéconomie 500 € sur les livres de statistiques Les prix unitaires sont : 50 € pour les livres de macroéconomie 50 € pour les livres de microéconomie 25 € pour les livres de statistiques Pour connaître le nombre total de livres achetés dans chaque catégorie, nous divisons les dépenses par le prix unitaire. Pour les livres de macroéconomie : 500 € / 50 € = 10 livres Pour les livres de microéconomie : 1000 € / 50 € = 20 livres Pour les livres de statistiques : 500 € / 25 € = 20 livres Le nombre total de livres achetés est de 10 + 20 + 20 = 50 livres. Maintenant, pour trouver le prix moyen par livre, on divise la dépense totale par le nombre total de livres : Dépense totale = 500 € + 1 000 € + 500 € = 2 000 € Prix moyen par livre = Dépense totale / Nombre total de livres = 2000€ / 50 = 40€ Ainsi, le prix moyen d'une œuvre est de 40 €, ce qui correspond à l'option (A).

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