1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sukhopar [10]
3 years ago
14

En una olimpiada matemática, cada estudiante recibe un punto por cada pregunta acertada. En la siguiente tabla de frecuencias se

muestra la clasificación de la cantidad de estudiantes de acuerdo con su puntaje obtenido. ¿Cuál es la probabilidad de seleccionar aleatoriamente un participante que haya obtenido entre 71 y 85 puntos?
Mathematics
1 answer:
Leviafan [203]3 years ago
4 0

La tabla relacionada con la pregunta se puede encontrar en la imagen adjunta a continuación:

Responder:

70%

Explicación paso a paso:

probabilidad de seleccionar aleatoriamente a un participante que haya obtenido entre 71 y 85 puntos:

Probabilidad = resultado requerido / Total de resultados posibles

Resultados posibles totales = Sumando la frecuencia para obtener el número total de estudiantes = (9 + 12 + 12 + 18 + 9) = 60 estudiantes

Resultado requerido:

Clase :

(71 - 75) = frecuencia = 12

(76 - 80) = frecuencia = 12

(81 - 85) = frecuencia = 18

Total = (12 + 12 + 18) = 42 = resultado requerido

Por tanto, P = 42/60 = 0,7 = (0,7 * 100%) = 70%

You might be interested in
Mia's perents said that she can use a space in the yard that measures. 13 feet long by 9 feet wide for her wildflower garden. Wh
ikadub [295]
A = L * W
A = 13 * 9
A = 117 square ft <==
7 0
3 years ago
There are 4,389 dogwood trees in the state park. The park workers are going to plant 342 more trees. How many trees will there b
Dmitrij [34]

Answer:

4731

Step-by-step explanation:

4,389+342=4,731

6 0
3 years ago
What is an equation of the line that passing through the points (-2, -5) and (4, 7) ?
monitta

Answer:

y=2x-1

Step-by-step explanation:

Use the slope-intercept formula: y=mx+b where m is slope and b the y-intercept.

(-2,-5)(4,7)

Use the slope formula for when you have two points:

\frac{y(2)-y(1)}{x(2)-x(1)}=\frac{rise}{run}

Rise over run is the change in the y-axis over the change in the x-axis. Insert values:

\frac{7-(-5)}{4-(-2)}

Simplify parentheses (negative+negative=positive)

\frac{7+5}{4+2}

Simplify

\frac{12}{6}=2

2 is the slope:

y=2x+b

Now use one of the points to find the y-intercept by substituting the x and y values into the equation. Solve for b:

(4,7)

y=2x+b\\7=2(4)+b

7=8+b\\7-8=8-8+b\\7-8=b\\-1=b\\b=-1

The y-intercept is -1. Insert into the equation. Change the + symbol to -:

y=2x-1

Done.

6 0
3 years ago
2+2+4= 8 x 12=<br> .........
Sveta_85 [38]

Answer:

96

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
A baker decorates 42 cupcakes in 30 minutes. She decorates cupcakes at a constant rate. How many cupcakes can the baker decorate
jolli1 [7]
Divide 42 by 30 and that should be your correct answer. 

hope this helps.
8 0
3 years ago
Read 2 more answers
Other questions:
  • Simplify the radical expression 3/√3
    14·1 answer
  • Z2=49 what are the solution?
    5·2 answers
  • If the shirts cost $20 each how much were each of the pants?
    10·1 answer
  • Which of those is an example of numerical data ? A. Average speed b. Type of pet C. Favorite car d.home state
    13·1 answer
  • Please help me with 4 and 5
    10·1 answer
  • The average (mean) of 90 numbers is 60, and the average of 60 numbers is 90. What is the average of all the numbers?
    14·1 answer
  • Given f(x) = -5x + 4 and g() = x4, choose<br> the expression for (fºg)(x).
    12·1 answer
  • WILL GIVE BRAINLIEST
    14·1 answer
  • What is the length of z? (Round to the nearest tenth)
    10·1 answer
  • Answer 36. Lara has the following scores: 25, 45, 50 and 36. There is one more test and Lara wants his average to increase by 4,
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!