Mathematics High School

one of these students is chosen at random. what is the probability of picking a student who scored above 65​

One Of These Students Is Chosen At Random. What Is The Probability Of Picking A Student Who Scored Above

Answers

Answer 1

Answer:

7/18

Step-by-step explanation:

7 students received a score greater than 65, out of a total of 18 students

Answer 2

The probability of picking a student who scored above 65 is 1/3 when one of these students is chosen at random.

To calculate the probability of picking a student who scored above 65, we need to determine the number of students who scored above 65 and divide it by the total number of students.

Looking at the given marks:

46, 65, 54, 57, 62, 73, 73, 47, 69, 48, 63, 68, 55, 48, 58, 71, 76, 70

We can see that the marks above 65 are: 73, 73, 69, 68, 76, 70 (a total of 6 marks).

Now, let's calculate the probability:

Probability = Number of favorable outcomes / Total number of outcomes

Number of favorable outcomes (students who scored above 65) = 6

Total number of outcomes (total number of students) = 18

Probability = 6 / 18

Simplifying the fraction:

Probability = 1 / 3

Therefore, the probability of picking a student who scored above 65 is 1/3.

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The complete question is :

Here are the marks 18 students got in a Maths test: 46, 65, 54, 57, 62, 73, 73, 47, 69, 48, 63, 68, 55, 48, 58, 71, 76, 70. a) Show this information in an ordered stem and leaf diagram: 5 | 4 4 7 8 8 6 | 2 3 5 8 7 | 0 1 3 3 8 | 9 | 6 b) One of these students is chosen at random: What is the probability of picking a student who scored above 65?

Related Questions

Write the equation of the
parabola that has x-intercepts of
(1,0) and (5,0) in standard form.

Answers

Answer:

y = x² - 6x +5

Step-by-step explanation:

(x -1)(x-5) = y

x² - 5x - x + 5 = y

x² - 6x +5 = y

-2(-6x+2u-3)
-3x-6(-6y+6x)-2y
3(w-6)-5w

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Answer:

c

Step-by-step explanation:

i just did the test this is my first answer please like

65 points! can someone help me understand this problem

Answers

Answer:

117

Step-by-step explanation:

It would be angle 117, because angle V and angle O are the same size and shape.

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Answers

Answer:

x=32

Step-by-step explanation:

180-122=58

58+90+x=180

148+x=180

32=x

What is the value of 3-(-2)?​

Answers

Answer:

5

Step-by-step explanation:

The answer is 5
You add when the equation is set up like that
for example : 4-(-3)=7

If I spend 40$ on 5 pounds on concrete. What is the unit rate in dollars per pound

I need the answer and please explain how unit rate works cause I don't know lol

Answers

Answer:

8$/lb

Step-by-step explanation:

because 8 x 5 is 40 there for each pound would be 8$ if there are 5 pounds

The correct answer is $8 per pound

Becky is using the expression 2z + 3 to represent the number of chairs in her classroom. There are twice as many chairs as tables, and there are three extra chairs in the back. What does z represent?

The number of chairs.
The number of tables.
The number of chairs at tables.
The number of chairs and tables.

Answers

Answer:

The number of chairs

Step-by-step explanation:

The equation is 2z + 3

2 ( = multiply by)

z ( # of chairs)

+3 ( the 3 extra chairs in the back)

Answer:

The number of tables

Step-by-step explanation:

Sens there is twice as many chairs as tables, the number 2 represents the chairs. The 3 represents the 3 extra chairs in the back. so the only logical object to represent z is the number of tables.

How many minutes does it take Lexus to skateboard 2 1/2 miles?

Answers

Answer:  I'm doing this problem too, so the equation I used was y=4x+20.  Now we need to find how many minutes can Lexus skateboard in 2 1/2 miles.

help. . . . . . . .. . . . . . . . . . . pLease i will give brainliest

Answers

Answer:

2/8

Step-by-step explanation:

Since both have the same denominator its just subtraction. If you have 3 pieces of pie and eat 1, you have 2 left.

3-1=2

Then just add the denominator back on the bottom!

Reminder: This only works if the denominator is the same.

The answer is... 2/8

Anthony went shopping for a new pair of sneakers. Sales tax where he lives is 4%. The price of the pair of sneakers is $37. Find the total price including tax. Round to the nearest cent.

Answers

Answer:

$38.48

Step-by-step explanation:

37*0.04 = 1.48, 37 + 1.48 = 38.48

Tammy jumped up 9 steps. Each step was
7/10 feet high.
How high up did she jump altogether?
Write your answer in simplest form.

Answers

Answer: 6 and 3/10 0r 63/10

Step-by-step explanation:

You decide to buy a custom frame for a painting which measures 4 by 6 inches. If the framing material costs $2 per inch, what is the total cost of framing material?

Answers

Answer:

6 x 4 = 24 x $2 = $48

Step-by-step explanation:

The total cost of the rectangular frame is C = $240.

What is rectangle?

A rectangle is a two-dimensional shape in which the opposite sides are parallel and equal to each other and all four angles are right angles.

Given that, a painting measures 4 by 6 inches, the framing material costs $2 per inch,

We need to find the total cost of framing material

The perimeter is given by:

P = 2x(L + W)

In this case, we know that the frame is 6 inches by 14 inches, then the perimeter will be:

P = 2x(6in + 14in)

P = 2x20in = 40in

Since, the framing material costs $6 per inch, then the total cost of the frame will be:

cost = 40x$6 = $240

Learn more about rectangles:

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(5x + 2)
(3x+2)
It has to equal 180 degrees but I don't know what it is

Answers

I’m not exactly sure the answer because it doesn’t look like the full question but
(5x + 2) (3x + 2) = 180
15x + 4 = 180
15x = 176
_
X = 11.73
Quadrilateral ABCD has, of course, four angles. Those four angles are in the ratio 2:3:3:4. Find the degree measure of the biggest angle of quadrilateral ABCD.

For the following statements 11 - 16 write TRUE or FALSE.

11. Through any two points there is exactly two lines.

12. A line contains of at LEAST two points.

13. A plane contains at least three non-collinear points.

14. Two lines intersect at a point.

15. Two planes intersect at a point.

16. A line and a plane intersect at a line.

Answers

Answer:11 is false. Through any two points there is exactly one line. 12 is true. 13 is true. 14 is true. 15 is false. Two planes intersect at a line. 16 is false. A line and a plane would intersect at a point

Step-by-step explanation:

Estimate the sale price of the item.
30% off a bike for $432.43

Answers

Answer:

129.73

Step-by-step explanation:

432.43x30%=129.73

Discount = Original Price x Discount %/100
Discount = 432.43 × 30/100
Discount = 432.43 x 0.3
You save = $129.73

Final Price = Original Price - Discount
Final Price = 432.43 - 129.729
Final Price = $302.70

Hi! Can someone help me?
3-x divide by 3/5; x=1/4

Answers

Hope this helps have a nice day

What is the to m(3 +m)

Answers

Answer:

3m+m^2

Step-by-step explanation:

Answer:

I love algebra anyways

The ans is in the picture with the  steps how i got it

(hope this helps can i plz have brainlist :D hehe)

Step-by-step explanation:

What is the answer to 9+10?

Answers

Answer:

19

Step-by-step explanation:

I used my fingers and toes

PLEASE HELP Review the equation, then complete the following. f(x)=1/x-4, g(x)=4x+1/x ​Use composition to prove whether or not the functions are inverses of each other. Express the domain of the compositions using interval notation.

Answers

Answer:A. Yes, they are inverse of each other.

B. Domain and range of the compositions is .

Step-by-step explanation:

A. We have,  and .

Now, 'when two functions f and g are inverses of each other, they satisfy the property '.

So, we have,

 

Thus, we get for the given function f and g, .

Hence, they are inverse of each other.

B. Now, as we have,

That is, the composition of the functions is equal to the identity function.

Thus, the domain and range are the set of all real numbers respectively.

So, in the interval notation, we have,

Domain and range of the compositions is .

1) Dado o extrato bancário, marque a opção correta: *

1 ponto



a) O saldo depois do cheque nº 1 é de R$ -100,00.

b) Depois do depósito realizado de R$ 250,00 o saldo é R$ 550,00.

c) O saldo final é R$ 100,00 negativo.

d) Depois do saque de R$ 600,00 o saldo ficou positivo.

2) Dado a pirâmide abaixo, marque a opção incorreta *

1 ponto



a) A soma dos três números da linha de baixo da pirâmide é +4.

b) O número A que está faltando é +22.

c) O número B vale +4.

d) A soma entre A e B é 18.

​

Answers

A resposta correta é a letra c

2x + 5y = -24
3x - 5y = 14
Solve by elimination
y and x

Answers

Answer:

x = -2

y = -4

Step-by-step explanation:

The way systems of equations  work is that you have to substitute to solve for a variable *(only one of the 2 ways to figure this out)*

so, we will use addition property of equality in a form to add the two equations together, since +5y and -5y added together will cancel out.

that would leave

5x = -10

divide both sides by 5

x = -2

Now that we know x = -2, we can plug in -2 into one of the equations to find y.

2 ( -2)  + 5y = -24

-4 + 5y = -24

-4 + 4 + 5y = -24 + 4

5y = -20

y = -4

x = -2

y = -4

help on last question plsssssssssssssssssssssssssssssssss

Answers

What is the question?????

I need help asap! This is a math pearson.

Answers

Answer:

2.4x105

Step-by-step explanation:

D

Answer: BHope this helps hope you get a good score on test/assignment/quiz/homework also can I get the brain thing pls-Tay did this

11k = -143 I need help with this question

Answers

Answer:

k = -13

Step-by-step explanation:

-143/11 = -13

Answer:

11k = -143

k=-143/11=-13 is a required answer

find the value of x 12.5, 12, 15

Answers

Answer:

Find the value of x for the given expression: 10x = 50 · Find the value of x for 15 + x = 30 · Find the value of x for the given equation 12 + 2x + 18 = 10.

Step-by-step explanation:

You are making curtains for your little sister's dollhouse. There are 24 windows on the dollhouse and each
needs 3.75 inches of fabric for curtains. How much fabric will you need?
(please help I only have a couple of minutes)

Answers

is it 90? sorry if it’s wrong

Answer:

90 inches

Step-by-step explanation:

24 x 3.75 which is the same as 24 x 3 3/4 which is the same as

24 x 15/4 = 6 x 15 = 90

Evaluate -29 - X
when x = 6

Answers

Answer:

wouldn't that just be -35?

Step-by-step explanation:

you just have to do -29-6

model of a planned baseball stadium is 2 ft wide. The actual stadium will be 200 yd wide. What is the scale factor?




a

1 foot = 100 yards

b

2 feet = 50 yards

c

1 foot = 200 yards

d

1 foot = 50 yards

Answers

The answer to your question is

1 foot = 100 yards

find the slope of the line​

Answers

Answer:

y=3/4x+3

Step-by-step explanation:

what is a negative number that is greater than -10?

Answers

Answer:

-5

Step-by-step explanation:

-9


explanation: simple
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