A researcher is selecting lab rats for her experiment. She assigns each rat a number and picks numbers out of a hat while blindfolded. The pool of rats from which she is drawing participants is composed of the following: 23 male albino rats 21 male spotted rats 35 female albino rats 11 female spotted rats If she reaches into the hat twice, what is the probability of choosing a male albino rat and then either a female albino rat or a male spotted rat

Answers

Answer 1

Answer: [tex]\dfrac{76}{89}[/tex]

Step-by-step explanation:

The pool of rats from which the researcher is drawing participants is composed of the following:

23 male albino rats

21 male spotted rats

35 female albino rats

11 female spotted rats

Total rats = 23+21+35+11 =90

[tex]P(male\ albino)=\dfrac{23}{90}[/tex]

After drawing first rat , total rats remained = 89

[tex]P(\text{either a female albino rat or a male spotted rat})=\dfrac{35+21}{89}=\dfrac{76}{89}[/tex]

The probability of choosing a male albino rat and then either a female albino rat or a male spotted rat = [tex]\dfrac{76}{89}[/tex]


Related Questions

(40 POINTS!!) solve for x

Answers

Answer:

do 13+7 you will have your answer. (go down for answer)

Step-by-step explanation:

its 20

Determine if the triangles are similar. If they are similar state why they are similar and
complete the similarity statement. If the triangles are not similar, select "N/A" for the last
two dropdowns.
R
Q
11
14
U
V
22
28
S
[ Select)
The triangles are
vby
[ Select]

SUV-A [Select]

Answers

Explanation is in a file when they travel

Plz help me well mark brainliest if correct

Find the missing data
A) 41
B) 42
OC) 44
OD 53

Answers

Answer:

44? Im not to sure

Step-by-step explanation:

Answer:

44

Step-by-step explanation:

sequence starts at five and adds up by 6

Diego is buying candy by the pound. For every 10 pounds, he pays $23. What is the cost per pound?

Will give BRAINLIEST!!

Answers

10 pounds = 23 $
1 pound = 2$ and 30 cts

Just divide by ten.

ASAP I WILL GIVE BRAINIEST IF ANSWERED ASAP!! PLEASE PLEASE HELP

Answers

Answer:

2x + 3 =84

Step-by-step explanation:

Answer:

2x + 3 = 84

Step-by-step explanation:

which polynomial function has a real root of multiplicity 2?

A.y=7-6x+3x^2

B. y=4-12x+9x^2

C. y= 4x^2-5x+5

D. y=4-9x^2

(^2 means the power to)

Answers

d is the answer to the question

what is the slope line ​

Answers

Answer:

In technical terms, the slope of the line is the change in y over the change in x. But I just like to think of it as rise over run. To find the slope of the line, pick two points on the line.

Answer:

Uphill slopes are positive slopes.

The slope will be a positive number like 5 or 2/3.

Downhill slopes are negative slopes.

The slope will be a negative number like -7 or -1/3.

Step-by-step explanation:

Choose Yes or No to tell if the number 3 will make each equation true. 2 ÷ □ = 3 2 Choose... 2 ÷ 6 = □ Choose... 2 ÷ □ = 2 3 Choose... □ ÷ 8 = 3 8 Choose...

Answers

Answer:

1 no

2 yes

3 no

4 no

Step-by-step explanation:

2 ÷ □ =2/3, □ ÷ 8 = 3/8 is true for x is true which equation choose is yes.

What is Division?

A division is a process of splitting a specific amount into equal parts.

We have to choose yes or no to tell if the number 3 will make each equation true.

2÷□=3/2

To get 3/2 we have to divide two by three.

2/3=3/2

These are not equivalent so it is not yes.

The other expression 2 ÷ 6 = □

2 ÷ 6=1/3 which is not 3, so it is no.

The third expression

2 ÷ □ = 2/3

When we put 3 in the blank place we get two divided by three.

2 ÷ 3=2/3

Which is true so answer is yes for 3.

□ ÷ 8 = 3/8

When we put three in the blank we get three divided eight which is true.

3÷ 8 = 3/8 which is yes for 3.

Hence, 2 ÷ □ =2/3, □ ÷ 8 = 3/8 is true for x is true which choose is yes.

To learn more on Division click:

https://brainly.com/question/21416852

#SPJ2

!!!!please helppppppp

Answers

9514 1404 393

Answer:

  13/18

Step-by-step explanation:

5 of the 18 students have a cat, so 13 of them do not.

The probability that a student in the group does not have a cat is 13/18.

Jorgensen Company has sales of $380,000,000, and the break-even point in sales dollars is $323,000,000. Determine Jorgensen Company’s margin of safety as a percent of current sales

Answers

Answer:

1) a. break even point in units = fixed cost / contribution margin                                                   = 1,750,000 / 5                                                  = 350,000 units

Step-by-step explanation:

Solve for y
(4y+7)
(3y+5)

Answers

Answer:

24

Step-by-step explanation:

(4y + 7) + (3y + 5) = 180. (angle on a straight line =180)

4y + 7 + 3y + 5 =180

4y + 3y + 7 + 5 = 180

7y + 12 = 180

7y = 180 - 12

7y = 168

y = 168/7

y = 24

Answer:

24 if im correct

Step-by-step explanation:

what is 3/4 x 12 inches

Answers

Answer:

9

Step-by-step explanation:

There are 15 boys and 18 girls in seventh grade. Find the ratio of boys to girls in seventh grade.

Answers

Answer:

15:18

Step-by-step explanation:

The diagonals of square ABCD intersect at point E. If BE = 2x + 1, and AC = 3(6x - 4), find BD.
1
3
6
9

Answers

Answer:

Step-by-step explanation:

Answer:

It is 6

Step-by-step explanation:

I did the problem already

Tess works at a sandwich shop. When assembling their turkey sandwich, they are instructed to use 5 pieces of sliced turkey and 2 pieces of cheese. If Tess is assembling a party platter of these turkey sandwiches and uses 12 pieces of cheese, how many slices of turkey will she use?

Answers

12/2x5=30 30 slices of turkey.

Which statement describes the graph of f(x)=Lx]-2 on [0, 3)?
The steps are at y = -2 for 0 5x < 1, at y=-1 for 1 Sx < 2, and at y = 0 for 2 O The steps are at y = 0 for I Sx <1, at y = 1 for 1 O The steps are at y = 1 for 0 O The steps are at y = -3 for i Sx <1, at y=-2 for 1 Sx <2, and at y = -1 for 2

Answers

I think it’s the second one I’m not sure :/

f(x) = -Lxl is the function and -3 ≤x≤3 is the domain that could represent the given graph .

What is a function ?

Function is an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).

here, we have,

We know, domain is:

The domain of a function is the set of values that we are allowed to plug into our function. This set is the x values in a function such as f(x). The range of a function is the set of values that the function assumes. This set is the values that the function shoots out after we plug an x value in.

Thus , from the graph it can be clearly depicted that it is representing f(x)=-Lxl for an entire range of  -3 ≤x≤3 .

Hence , f(x) = -Lxl is the function and -3 ≤x≤3 is the domain that could represent the given graph .

Learn more about function and domain  at:

brainly.com/question/1369616

#SPJ7

Complete question:

Which function and domain could represent the given

graph?

O f(x)=1-Lx]; -3 O f(x) = 1 + Lx]; -3 ≤x≤ 3

O f(x)=-Lxl; -3 ≤x≤3

O f(x)=Lx]; -3

What is the total number of digits required in numbering the pages of a book which has 1210 pages?

Answers

Answer:

3693 digits

Step-by-step explanation:

Answer:

3733

Step-by-step explanation:

9x1=9

90x2=180

900x3=2700

211x4=844

9+180+2700+844=3733

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. Release your mouse button when the item is place. If you change your mind, drag the item to the trashcan. Click the trashcan to clear all your answers. Factor completely and then place the factors in the proper location on the grid. 25a 2 - 30a + 9

Answers

Answer:

(5a−3)^2

Step-by-step explanation:

25a^2 - 30a + 9

Factor the expression by grouping. First, the expression needs to be rewritten as 25a^2+pa+qa+9. To find p and q, set up a system to be solved.

p+q=−30

pq=25×9=225

Since pq is positive, p and q have the same sign. Since p+q is negative, p and q are both negative. List all such integer pairs that give product 225.

−1,−225

−3,−75

−5,−45

−9,−25

−15,−15

Calculate the sum for each pair.

−1−225=−226

−3−75=−78

−5−45=−50

−9−25=−34

−15−15=−30

The solution is the pair that gives sum −30.

p=−15

q=−15

Rewrite 25a^2 - 30a + 9 as (25a^2−15a)+(−15a+9).

(25a^2−15a)+(−15a+9)

Factor out 5a in the first and −3 in the second group.

5a(5a−3)−3(5a−3)

Factor out common term 5a−3 by using distributive property.

(5a−3)(5a−3)

Rewrite as a binomial square.

(5a−3)^2

whats 2+7 because i really need help

Answers

Answer:

9 LOL-

Step-by-step explanation:

What is the slope of the line represented by the equation y = -1/2x+1/4​

Answers

Answer: m=-1/2 which is the slope

Step-by-step explanation:

Answer:

-1/2

Step-by-step explanation:

in an equation, the number with the x is always the slope. thx

Answer this correctly and explain your answer I’ll give you brainalist + 10 points

Answers

Answer:

D

Step-by-step explanation:

Use triangle inequalities:

7+10>x

x+10>7

x+7>10

Solve these and the conclusion is that it needs to be greater than 3 but less than 17.

Answer:

D) greater than 3 but less than 17

Step-by-step explanation:

The third side must be greater than the difference and smaller than the sum of the two other sides.

10-7=3

10+7=17

so the third side must be greater than 3 and less than 17

which value from the set makes 12n-15=42 true?
A.2.25
B.2.8
C.3.5
D.4.75​

Answers

D. 4.75

If you substitute n for 4.75, and multiply 12(4.75), you get 57. Then subtract 15, and you get 42.
the answer to your question is D, 4.75

PLease help me asnwer this!!

Answers

Answer:

The answer is 60x500=30000

Step-by-step explanation:

30000 is your answer

Unit 10: Circles Homework 4: Inscribed Angles

Find each angle or arc measure of mRS

Answers

Answer:

96 degrees

Step-by-step explanation:

Since you know that arc are twice the angle measure, that means arc RT is 42 * 2 = 84. Then, you have to find the measure of RS.

Remember that arc RT and RS have to add up to 180 degrees because they form a semicircle (half of a circle).

To find the measure of RS, just do 180 - 84 = 96 degrees.

Easter game idea's please!
my neighborhood always throws an Easter egg hunt but this year we wanted to spice things up and add some cool game with cool prizes and snacks! any ideas?? (dont worry we wear mask at the small neighborhood party's we have)

Answers

u guys can make ur own kind of twister, do Marco Polo but the Marco is an Easter bunny, u guys can do a scavenger hunt with different prizes for each person, you can see who can juggle the most eggs

Hello! May Someone Kindly help me with this? its worht 13 points!

Answers

so basically, to graph the points, you look at the x axis first. look at the first point. for example,(-2,4) look at the x axis and find -2. then, go up four points. do that to the rest of the points, then connect the dots, labeling the corresponding points you to A,B, and C. based off of this graph, turning it clockwise means to mirror it from the y axis. 90 degrees mean clockwise! from the new graph, bring each point 3 units down. thats it! good luck!

cómo se calcula la probabilidad de que salga el número 5 lanzando un dado 20 veces​

Answers

Normalmente, el fracaso se asocia con el valor 0 y el éxito con el 1. Se nombra como Be(p), donde p(X=1) = p es la probabilidad de obtener éxito y p(X=0) = q = 1-p la probabilidad obtener fracaso.

what is the median of these numbers​

Answers

Answer:

38.5

Step-by-step explanation:

Linda bought 14 souvenirs during 7 days of vacation. How many days will Linda have to
spend on vacation before she will have bought a total of 20 souvenirs? Assume the
relationship is directly proportional.
days

Answers

Answer:

10

Step-by-step explanation:

Find the value of x
(21x - 10)
19xº

Answers

Answer:

0

Step-by-step explanation:

First we move all the terms to the left so it will be 21x-10-(19x)=0 hope I helped good luck

Other Questions
What is the pH of a solution with an OH- ion concentration of 4.01E-4? What is the name for As4010? A park is rectangular with a length of 23 miles. If the area of the park is 39 square miles, what is its width? Input your answer as a fraction. Write the following expression using symbolic language.1) Five less than the product of seven and a number x 2) The difference of nine times a number y and eighteen3) Half a number n increased by four times the number4) Twice the sum of a number w cubed and twenty-three Find the HIGHEST Commonand lowest common multpleof 36 and 48 usingprime factors Which of the following best exemplifies the diffusion of popular culture throughout the world in contemporary society? A cheetah, like those shown below at left, and a paramecium, like the one shown below at right, are both living things. According to the cell theory, what can you conclude about these two very different organisms? PLSS HELP ME WITH THIS QUESTIONS!!! I WILL GIVE U BRAINLYEST!! PLSS HELP ME ASAP!!A job or way of living for many former slaves was sharecropping. Describe this occupation.Cotton production decreased and corn and wheat production increased in the Civil War timeperiod. Why?! (9) Draw a ray diagram for a 5.0-cm tall object placed 45.0 cm from a converging lens having a focal length of 15.0 cm 21 Reduced There are 32 munchkins in the box. You want to distribute the munchkins to Amir and Isaac so that the ratio of Amir's munchkins to Isaacs is 5:8.How many munchkins will each person get? Show/explain your work You deposit $400 in an account . The account earns $ 16 simple interest in years . What is the annual interest rate? year Nara wants to determine how much ice it will take to fill her cooler that is in the shape of a rectangular prism. If the cooler has a length of 22 inches, a width of 12 inches, and a height of 1012 inches, how much ice will her cooler hold? Find the slope of line y = -3x + 2 How did the annexation of Texas help contribute to the Civil War? A) The issue of admitting Texas as a slave state contributed to the conflict that caused the Civil War. B) Texans had nothing in common with U.S. citizens. The cultural differences made annexation difficult. C) Adding Texas as a state created an imbalance between southern and northern territories in terms of size. D) Texas was predominately Catholic, while the rest of America was Protestant. Adding Texas created religious conflict. I need help in the answer its math A grocer wants to mix two kinds of coffee. One kind sells for $1.00 per pound, and the other sells for $2.55 per pound. He wants to mix a total of 28 pounds and sell it for $1.35 per pound. How many pounds of each kind should he use in the new mix? (Round off the answers to the nearest hundredth.) 2.1 Define the meaning of the phrase entry requirements to higher educationinstitutions and state FOUR reasons why knowing the entry requirements isimportant. Professor Smith decides to track the dating behaviors of college students throughout their college careers. She decides to begin her research using her introductory class. After explaining the study, she assures students that their responses will be kept confidential. The students complete her survey during class. Her research most clearly impinges on: A. deception. B. analysis and reporting of the data. C. voluntary participation D. the value placed on anonymity E. value-free reports of the data. Do authoritarian governments exist today?. Yes, countries act as authoritarian governments such as North Korea. Yes, countries act as authoritarian governments such as ArgentinaNo, countries may look like authoritarian governments but they are actually not. No, it is impossible to be an authoritarian government Josiah had 128 toy cars. If he organizes them into groups of 7 , how many cars will be in the final group?