Question

On January 25th, 80% pass, on January 31st, 75% pass, and on February 3rd, 85% pass. Determine the minimum percentage of integralists?

261

likes
1306 views

Answer to a math question On January 25th, 80% pass, on January 31st, 75% pass, and on February 3rd, 85% pass. Determine the minimum percentage of integralists?

Expert avatar
Cristian
4.7
119 Answers
Să presupunem că numărul total de întregiți este reprezentat de variabila $x$.

Pe 25 ianuarie trec 80% din numărul total de întregiți, ceea ce înseamnă că numărul de întregiți care trec este $0.8x$.

Pe 31 ianuarie trec 75% din numărul total de întregiți, ceea ce înseamnă că numărul de întregiți care trec este $0.75x$.

Pe 3 februarie trec 85% din numărul total de întregiți, ceea ce înseamnă că numărul de întregiți care trec este $0.85x$.

Pentru a determina procentul minim de întregiți, trebuie să găsim cea mai mică valoare comună (CMMD) a procentelor menționate mai sus.

Luând în considerare acești trei factori comuni ai întregiților, putem folosi formula $CMMD = \frac{x}{100}$, unde $x$ reprezintă procentul minim de întregiți care trec.

CMMD = \frac{x}{100} = \frac{0.8x}{100} = \frac{0.75x}{100} = \frac{0.85x}{100}

Pentru a găsi procentul minim de întregiți, putem găsi CMMDC-ul procentelor 80%, 75% și 85%. Putem face acest lucru prin simplificarea fracțiilor:

CMMD = \frac{x}{100} = \frac{0.8x}{100} = \frac{4}{5} \cdot \frac{x}{100} = \frac{3}{4} \cdot \frac{x}{100} = \frac{17}{20} \cdot \frac{x}{100}

Acum putem determina procentul minim de întregiți:

\frac{x}{100} = \frac{17}{20} \cdot \frac{x}{100} \Rightarrow 1 = \frac{17}{20} \Rightarrow \frac{20}{20} = \frac{17}{20} \Rightarrow \frac{3}{20} = \frac{x}{100} \Rightarrow x = \frac{3}{20} \cdot 100 = \frac{300}{20} = \frac{15}{1} = 15

Answer: Procentul minim de înegalități este de 15%.

Frequently asked questions (FAQs)
What are the characteristics of the quadratic function f(x) = x^2? Explain concavity, vertex, axis of symmetry, and range.
+
Question: What is the maximum value of the function f(x) = x^3 on the closed interval [-2, 2]?
+
What is the distance travelled by a car if it travels at an average speed of 60 km/h for 3 hours?
+
New questions in Mathematics
Two fire lookouts are 12.5 km apart on a north-south line. The northern fire lookout sights a fire 20° south of East at the same time as the southern fire lookout spots it at 60° East of North. How far is the fire from the Southern lookout? Round your answer to the nearest tenth of a kilometer
The profit G of the company CHUNCHES SA is given by G(x) = 3×(40 – ×), where × is the quantity of items sold. Find the maximum profit.
In a normally distributed data set a mean of 31 where 95% of the data fall between 27.4 and 34.6, what would be the standard deviation of that data set?
A job takes 9 workers 92 hours to finish. How many hours would it take 5 workers to complete the same job?
how many arrangement can be made of 4 letters chosen from the 8 letters of the world ABBSOLUTE
A person borrows rm 1000 from a bank at an interest rate of 10%. After some time, he pays the bank rm 1900 as full and final settlement of the loan. Estimate the duration of his loan.
prove that if n odd integer then n^2+5 is even
7. Find the equation of the line passing through the points (−4,−2) 𝑎𝑛𝑑 (3,6), give the equation in the form 𝑎𝑥+𝑏𝑦+𝑐=0, where 𝑎,𝑏,𝑐 are whole numbers and 𝑎>0.
A researcher is interested in voting preferences on change of the governing constitution in a certain country controlled by two main parties A and B. A questionnaire was developed and sent to a random sample of voters. The cross tabs are as follows Favour Neutral Oppose Membership: Party A 70 90 85 Party B 50 50 155 Test at α = 0.05 whether party membership and voting preference are associated and state the conditions required for chi-square test results to be valid.
DuocUC 2) The cost C, in pesos, for the production of x meters of a certain fabric can be calculated through the function: (x+185) C(x)=81300-6x+ 20000 a) It is known that C(90) 5.344. Interpret this result. (2 points) b) Calculate C'(x) (2 points) 3 x²+111x-0.87 20000 2000 c) Function C calculates the cost while producing a maximum of 500 meters of fabric. Determine the values of x at which the cost of production is increasing and the values of x at which the cost is decreasing. (3 points) d) If a maximum of 500 meters of fabric are produced, what is the minimum production cost? (
From 1975 through 2020 the mean annual gain of the Dow Jones Industrial Average was 652. A random sample of 34 years is selected from this population. What is the probability that the mean gain for the sample was between 400 and 800? Assume the standard deviation is 1539
Determine the increase of the function y=4x−5 when the argument changes from x1=2 to x2=3
The two sides of the triangle are 12 cm and 5 cm, and the angle between the sides is 60°. Cover the area of ​​the triangle!
X~N(2.6,1.44). find the P(X<3.1)
Find the equation of a straight line that has slope 3 and passes through the point of (1, 7) . Write the equation of the line in general forms
solve R the following equation 4 x squared - 35 - 9 over x squared is equal to 0
The inner radius of a spherical ball is 13 cm. How many liters of air are in it? Justify your answer!
g(x)=3(x+8). What is the value of g(12)
Paola went on vacation for 15 days if it rained 20% of the days. How many days did it rain?
Slope (7,3) and (9,5)