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

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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

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Sigrid

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120 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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