At the beginning of the semester, a professor tells students that if they study for the tests, then there is a 55% chance they will get a B or higher on the tests. If they do not study, there is a 20% chance that they will get a B or higher on the tests. The professor knows from prior surveys that 60% of students study for the tests. The probabilities are displayed in the tree diagram.

A tree diagram. Random student to studies for test is 0.6, and to does not study for test is 0.4. Studies for test to Gets B or higher is 0.55; does not get B or higher is 0.45. Does not study for test to Gets B or higher is 0.20; does not get B or higher is 0.80.

The professor informs the class that there will be a test next week. What is the probability that a randomly selected student studied if they do not pass the test with a B or higher?

0.45
0.46
0.54
0.59

At The Beginning Of The Semester, A Professor Tells Students That If They Study For The Tests, Then There

Answers

Answer 1

Answer:

.54

Step-by-step explanation:

Answer 2

The probability is 33%.

what is probability?

The probability is the measure of the likelihood of an event to happen.

Given:

Random student to studies for test is 0.6, and to does not study for test is 0.4.

Studies for test to Gets B or higher is 0.55; does not get B or higher is 0.45.

Does not study for test to Gets B or higher is 0.20; does not get B or higher is 0.80.

P(A) =55%

P(B)= 20%

60% of the students study.

So, the probability that a student studies, and gets B or higher is:

Probability =P(A) * 0.6

P= 55* 0.6

Probability = 33%

Hence, the probability is 33%

Learn more about probabilities here:

brainly.com/question/10837034

#SPJ5


Related Questions

at the zoo,the ratio of monkeys to gorillas is 5:1​

Answers

Answer:

thats a statement

Step-by-step explanation:

HEY YOU! can you help me ?❤️

Answers

The answer is C.

If you take away one zero from both the denominator and the numerator, you are left with the fraction 6/10

The ratio of employees who own a red car to employees who own a black car is
1:5. If there are 6 employees who own a red car, how many employees own a
black car? *

Answers

Answer:

There would be 30 black cars.

Since the ratio is 1:5

And we know that there are 6 red cars,

we basically just input it in our ratio

so it would look like 6:x

Now, we just have to plug in for x.

To do that, you have to multiply 6 by 5

To match the ratio.

So that would give us 6:30

And if we divide by 5 we should get our original ratio.

I know this seems confusing haha, but I hope you get it, it's not as hard as it looks !!

How to find the radius of a cylinder with only knowing it's height and diagonal thing here

Answers

The radius times pie equals the circumference. keep that in mind



What is |-8|?
-16
-8
08
16

Answers

Answer:

it's 8

Step-by-step explanation:

lol girl I did this in the first day of school in 6th and I got the same answer , -8 is a negative, your supposed to put it back to a non negative when something is negative change it back to positive it's 8!

HELLLLLPPPPPPPP MY SISTER HAS LATE HOMEWORKKKKK she need help with number 4. the empty space is the part where She need to show how She got her answer so if someone could help that would mean the world to me and her

Answers

Answer:

13

Step-by-step explanation:

13x4=52 that would be in the check section or whatever but she did really good

Answer:

Your sister did the equation perfectly. That's exactly how I would work it, and the answer is 13.

there are 8 dinner rolls in a package. how many packages will be needed to feed 88 people if each person has 2 dinner rolls

Answers

Answer:

22

Step-by-step explanation:

8 times 10= 80 +8=88. now thats 11 packages. 11 times 2=22

solve each system by graphing.​

Answers

This is how I believe it would look like

This is Amy's box of candies.
She has already eaten 6 of them.

What fraction of the candies has Amy eaten?

Answers

Answer:

[tex] \frac{6}{9} [/tex]

or

[tex] \frac{2}{3} [/tex]

Step-by-step explanation:

There are nine in total and she has eaten 6, so the fraction would be 6/9.

If you need to simplify it it would be 2/3.

Which inquality is graft below?

Answers

Answer:

Option C - 2x + y > 2

Step-by-step explanation:

We don’t have to do some serious math here. We can already eliminate half of the options just looking at it, because the graph has a dotted line, which means it does not include those values.

So, choses A and B are eliminated because the inequality shows the ≥ and ≤ symbol, which means that it does include those values. It’s either C or D because they have the > and < symbol, which means that the inequality does not include those values.

To have a better look at the inequalities, write them in slope-intercept form, which is y=mx+b:

Option C: y > -2x + 2

Option D: y < -2x +2

Just looking at the inequlaity symbol, we can tell that Option C is the correct one because it shows that all the y-values are greater than -2x + 2. Which is true because it’s shaded above the line. When it’s shaded above the line, it means that the y-values are greater.

To make sure my answer was correct, I graphed Option C. The image below shows Option C (2x + y > 2) graphed.

Hope this helps! :)

What is 4(2 + a) = 24
a=

Answers

a=4 biigchvuivbibiinon

Answer:

2/5

Step-by-step explanation:

Rearrange terms:

4(2 + a) = 24a

4(a + 2) = 24a

Distrbute:

4(a + 2) = 24a

4a + 8 = 24a

Subtract 8 from both sides of the equation:

4a + 8 = 24a

4a + 8-8 = 24a-8

Simplify:

4a = 24a - 8

Subtract 24a from both sides of the equation:

4a = 24a - 8

4a - 24a = 24a - 8 - 24a

Combine like terms:

-20a = -8

Divide both sides of the equation by the same term:

-20a = -8

-20a/-20 = -8/-20

Simplify:

Cancel terms that are in both the numerator and denominator

Divide the numbers

a = 2/5

I hope that helps! :D

By 27leejaey

The vertices of ΔMNO are M (1, 3), N (4, 9), and O (7, 3). The vertices of ΔPQR are P (3, 0), Q (4, 2), and R (5, 0). Which conclusion is true about the triangles?
The ratio of their corresponding sides is 1:2. 
The ratio of their corresponding angles is 1:2. 
They are similar by the definition of similarity in terms of a dilation. 
They are congruent by the definition of congruence in terms of rigid motions.​

Answers

C. They are similar by the definition of similarity in terms of a dilation.

The conclusion about the triangles is (c) they are similar by the definition of similarity in terms of a dilation.  

The coordinates are given as:

[tex]M = (1,3)[/tex]

[tex]N = (4,9)[/tex]

[tex]O = (7,3)[/tex]

[tex]P =(3,0)[/tex]

[tex]Q = (4,2)[/tex]

[tex]R = (5,0)[/tex]

Start by calculating the lengths of the triangles using the following distance formula

[tex]d = \sqrt{(x_1-x_2)^2 + (y_1 -y_2)^2}[/tex]

So, we have:

[tex]MN = \sqrt{(1 -4)^2 + (3 - 9)^2}[/tex]

[tex]MN = \sqrt{45}[/tex]

[tex]MO = \sqrt{(1 -7)^2 + (3 - 3)^2}[/tex]

[tex]MO = 6[/tex]

[tex]NO = \sqrt{(4 -7)^2 + (9 - 3)^2}[/tex]

[tex]NO = \sqrt{45}[/tex]

[tex]PQ = \sqrt{(3 -4)^2 + (0 - 2)^2}[/tex]

[tex]PQ = \sqrt{5}[/tex]

[tex]PR = \sqrt{(3 -5)^2 + (0 - 0)^2}[/tex]

[tex]PR = 2[/tex]

[tex]QR = \sqrt{(4 -5)^2 + (2 - 0)^2}[/tex]

[tex]QR = \sqrt{5}[/tex]

So, we have:

[tex]MN = \sqrt{45}[/tex]                  [tex]PQ = \sqrt{5}[/tex]

[tex]MO = 6[/tex]                       [tex]PR = 2[/tex]

[tex]NO = \sqrt{45}[/tex]                   [tex]QR = \sqrt{5}[/tex]

The above means that the triangles are not congruent.

So, we determine if they are similar by dividing the corresponding sides

[tex]k = \frac{MN}{PQ} = \sqrt{\frac{45}{5}} = 3[/tex]

[tex]k = \frac{MO}{PR} = \frac{6}{2} = 3[/tex]

[tex]k = \frac{NO}{QR} = \sqrt{\frac{45}{5}} = 3[/tex]

The scale factor is 3.

Hence, the triangles are similar

Read more about similar triangles at:

https://brainly.com/question/14285697

Solve the system, enter ur answer as an ordered triple.

Answers

Answer:

x = 1, y = -1, z = 3

Step-by-step explanation:

x - 2y + 2z = 9

y + 2z = 5

z = 3

According to the last equation, z is equal to 3 so we can plug that in and our new 2 equations will be:

x - 2y + 6 = 9

y + 6 = 5

We can subtract 6 from both sides of the second equation to end up with:

y = -1

Now plugging this into the first equation, we have:

x + 2 + 6 = 9

x + 8 = 9

Subtract 8 from both sides

x = 1

3. Which is equivalent to the expression below?
4.5m + 8 - 2.3m - 3.5
A.6.7m
B. 6.8m + 4.5
C 2.2m + 11.5
D. 2.2m + 4.5

Answers

Answer:

D. 2.2m + 4.5

Step-by-step explanation:

I really need help please help me

Answers

Answer:

top right

Step-by-step explanation:

If you imagine yourself building with that model you can see its that one

Find the domain of the vector function. (Enter your answer in interval notation.) r(t) = t − 2 t + 2 i + sin(t)j + ln(36 − t2)k

Answers

Answer:

The domain of the vector function is :  ( -6, -2) ∪ ( -2, 6)

Step-by-step explanation:

The given vector function  can be correctly expressed as:

[tex]r(t) = \dfrac{t-2}{t+2}i + sin \ tj + In(36-t^2) k[/tex]

The domain of the given function can be determined by finding the domain of each respective component.

To start with [tex]\dfrac{t-2}{t+2}[/tex]

Not defined, t = -2

Thus, the domain of the first component of the vector = [tex]( - \infty , -2) \cup ( 2, \infty )[/tex]

The 2nd component = sin t

No restriction on t

The 3rd component of the function is ㏑(36 - t²)

Let recall that natural is defined for +ve numbers,

i.e.

36 - t² > 0

(6 + t) (6 - t) > 0

Thus, it satisfies the inequality  -6 < t < 6

The third domain = (-6,6)

Overall;

The domain of the vector function is :  ( -6, -2) ∪ ( -2, 6)

Domain of a function is the set all possible inputs for that function.The domain of the given vector function is,

[tex](-6, -2) \cap (-2,6)[/tex]

What is domain?

Domain of a function is the set all possible inputs for that function.

Given information-

The vector function given in the problem is,

[tex]r(t)=\dfrac{t-1}{t+2} \hat i++sin(t)\hat j+ln(49-t^2)\hat k[/tex]

To find the domain of the above vector function, we need to find the domain of each function of vector quantity.

Lets find the domain of [tex]\hat i[/tex] first which is given by,

[tex]\dfrac{t-2}{t+2}[/tex]

This function is defined at all values except, t equals to -2 as the function is not defined at,

[tex]t=-2[/tex]

Hence the domain of component [tex]\hat i[/tex] is,

[tex](-\infty, -2) \cap (\infty,2)\\[/tex]

Lets find the domain of [tex]\hat j[/tex] first which is given by,

[tex]\sin(t)[/tex]

Two trigonometry function sine and cosine defined for all real number.

This function is defined at all real numbers. Hence the domain of component [tex]\hat j[/tex] is

Lets find the domain of [tex]\hat k[/tex] first which is given by,

[tex]\ln(36-t^2)[/tex]

Set the above argument greater than zero to find where the expression is defined.Thus,

[tex](36-t^2)>0\\(6+t)(6-t)>0[/tex]

Therefore,

The domain of it should be [tex](-6,6)[/tex]

Hence the domain of the given vector function is,

[tex](-6, -2) \cap (-2,6)[/tex]

Learn more about the domain here;

https://brainly.com/question/10197594

are any of these equivalent to 3/8 ?
2/7
8/3
9/24
5/18

Answers

Answer:

9/24 is

Step-by-step explanation:

Yup

-BaconSoup the scientist LOL

Answer:

9/24

Step-by-step explanation:

[tex]\frac{2}{7}= 0.28571428571\\\\\frac{3}{8}= 0.375\\\\\frac{2}{7}\neq \frac{3}{8}\\\\ \frac{8}{3}= 2.666...\\\\\frac{8}{3} \neq \frac{3}{8}\\\\\frac{9}{24}=\frac{9/3}{24/3} =\boxed{\frac{3}{8}}\\\\ \boxed{\frac{9}{24}=\frac{3}{8}}\\\\\frac{5}{18}= 0.27777...\\\\\frac{5}{18} \neq \frac{3}{8}[/tex]

Hope this helps.

3, -9, 27, -81.......

Neither
Arithmetic
Geometric ​

Answers

Answer:

Geometric

Step-by-step explanation:

sorry if I am wrong just let me know please

I think it’s Geometric


The pottery store can make 176 coffee mugs in an 8 hour day. How many mugs can they make in one hour
Watch your units!

Answers

Answer:

22 per hour

Step-by-step explanation:

8 divided by 176 lol Hope I did it right tho ;-;

Answer:

they can make 22 in one hour.

Are x and 1/x like terms?

Answers

Answer:

no

Step-by-step explanation:

we'll say x=5

5 does not equal 1/5

no, but x also means 1 and 1/x is different

Pls I need answer quick, pls

Answers

Answer:

its a hope this helps

Step-by-step explanation:

The stock of Company A gained $1.86 throughout the day and ended at a value of $94.86. By what percentage did the stock rise

Answers

Answer:

tTe answer is 1.96%

Step-by-step explanation:

given data

change in price/gain= $1.86

the closing price = $94.86

Required.

The percent rise.

Step two:

The formula for the percent rise is

=change/close price*100

substitute our given data

= 1.86/94.86*100

=0.0196*100

=1.96%

Which point is a solution to this system of inequalities?
y 6
A) (7,-8)
B) (2,-3)
C) (5,-2)
D) (4,1)

Answers

Answer:

h

Step-by-step explanation:

Answer:

the answer is  c

Step-by-step explanation:

Find the coordinates of the midpoint of a segment with endpoints A(-3,7) and B(8,-2)

Answers

Answer:

the midpoint is (2.5, 2.5)

A pet store sells dog treats and the prices are represented
in the graph
X = number of treats
y = cost (in dollars)
Select the true statement.
Select one
Each treat costs $0.50
Each treat costs $3
Each treat costs $2
Each treat costs 51

Answers

Answer: 1$

Step-by-step explanation:

A store orders 22 boxes of light bulbs. Each box has 148 bulbs.
Which is the best estimate of the total number of bulbs the store orders?


plzzz answer.

Answers

Answer:

estimate, 3000. exact answer 3256

Step-by-step explanation:

hope this helps

Question:
Find the limit
x2 – 3x – 28/x-7
lim 7

Answers

See attachment for math work and answer.

12 hungry friends see 8 cupcakes sitting b.
on the table. If they split the cupcakes
equally, how many does friend each get?
12 other friends are told they can eat 0.8 cupcakes each. How many total cupcakes do these 12 friends eat?

I already got the answer for the first question, but i only want to know how to do the next question, I do NOT want the answer. Thanks!

Answers

1: 1/2 cupcakes
2: I’m in middle school so uhm-

Answer: a. 1 1/2   b. 9.6

Step-by-step explanation:

Slope, m = 3, y-intercept, b = 5

Answers

Answer:

I can't help if I don't have enough to answer sorry

Step-by-step explanation:

What are the missing angles?

Answers

1. 51
2. 34
3. 95
4. 38
5. 47
6. 74
7. 59

I hope this helps!!
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