MathMaster logo

MathMaster

  1. Home
  2. general
  3. 1 the university library purchased books on macroeconomics microeconomics and statistics she devoted 500 to the purchase o
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

146

likes
729 views

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
119 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).

Frequently asked questions (FAQs)
Question: "If the median of a data set is 30, what is the maximum possible difference between the largest and smallest values in the data set?"
+
Question: What is the value of the square root function when the input is 16?
+
What is the measure of the central angle in a circle, if the corresponding arc is one-fifth of the circumference?
+
New questions in Mathematics
(x^2+3x)/(x^2-9)=
1 plus 1
The bus one way of the road which is 10km is heading with speed of 20km/h ,then the bus the other 10km is heading with speed of 60km/h. The middle speed of the road is it equal with arithmetic speed of the v1 and v2 ?
If eight basketball teams participate in a tournament, find the number of different ways that first, second, and third places can be decided assuming that no ties are allowed.
If f(x,y)=6xy^2+3y^3 find (∫3,-2) f(x,y)dx.
Substitute a=2 and b=-3 and c=-4 to evaluate 2ac/(-2b^2-a)
show step by step simplification: (¬𝑑∨((¬b∧c)∨(b∧¬c)))∧((𝑎 ∧ 𝑏) ∨ (¬𝑎 ∧ ¬𝑏))∧(¬𝑐∨((¬𝑑∧𝑎)∨(𝑑∧¬𝑎)))
In a order to compare the means of two populations, independent random samples of 410 observations are selected from each population, with Sample 1 the results found in the table to the right. Complete parts a through e below. X1 = 5,319 S1= 143 a. Use a 95% confidence interval to estimate the difference between the population means (H - H2) Interpret the contidence interval. The contidence interval IS (Round to one decimal place as needed.) Sample 2 X2 = 5,285 S2 = 198 Aa. Use a 95% confidence interval to estimate the difference between the population means (A1 - M2) Interpret the contidence interval. The contidence interval Is (Round to one decimal place as needed.) b. Test the null hypothesis Ho versus alternative hypothesis Ha (H What is the test statistic? H2) + Give the significance level of the test, and interpret the result. Use a = 0.05. Z=
A stunt man jumps horizontally from a building to the roof of a garage that is 2 meters lower. How fast does he need to be to land on the roof of the said garage that is 3 meters away from the building?
3 A tree is planted when it is 1.2 m tall. Every year its growth is 3/8 of its previous year's height. Find how tall the tree will grow.
P(Z<z)=0.1003
Find the center coordinates and radius of a circle for an equation written as: 3x2 + 3y2 - 6y = —12× + 24
7.57 Online communication. A study suggests that the average college student spends 10 hours per week communicating with others online. You believe that this is an underestimate and decide to collect your own sample for a hypothesis test. You randomly sample 60 students from your dorm and find that on average they spent 13.5 hours a week communicating with others online. A friend of yours, who offers to help you with the hypothesis test, comes up with the following set of hypotheses. Indicate any errors you see. H0 :x ̄<10hours HA : x ̄ > 13.5 hours
48 kg of 30% sulfuric acid in a mixture of 10% and 40% sulfuric acid arose. How many kilograms were each of the original solutions?
-5x=115
How many cards do you expect to pull from a poker deck until you get an ACE?
If sin A=0.3 and cos A=0.6, determine the value of tan A.
A membership to the gym cost $25 per person in 1995. The membership cost has increased by an average $6 per person for each year since 1995. Write a linear equation for the cost of a gym membership for one person since 1995. What is the cost of a gym membership in 2009?
write in set builder notation { 1,3,9,27,81,243,...}
A plant found at the bottom of a lake doubles in size every 10 days. Yeah It is known that in 300 days it has covered the entire lake, indicate how many days it will take to cover the entire lake four similar plants.

You might be interested in