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

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

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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!

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Explanation is in a file when they travel

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

Will give BRAINLIEST!!

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

Just divide by ten.

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.

PLease help me asnwer this!!

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Answer:

The answer is 60x500=30000

Step-by-step explanation:

30000 is your answer

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

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Answers

Answer:

9 LOL-

Step-by-step explanation:

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 statement describes the graph of f(x)=Lx]-2 on [0, 3)?
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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:

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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

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.

what is the median of these numbers​

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Answer:

38.5

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:

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Answers

9514 1404 393

Answer:

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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.

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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

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

Answer:

Step-by-step explanation:

Answer:

It is 6

Step-by-step explanation:

I did the problem already

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

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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

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Answers

Answer:

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

Step-by-step explanation:

its 20

Plz help me well mark brainliest if correct

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Answers

Answer:

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Step-by-step explanation:

Answer:

44

Step-by-step explanation:

sequence starts at five and adds up by 6

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Answers

Answer:

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Step-by-step explanation:

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Answers

Answer:

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Step-by-step explanation:

Solve for y
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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

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Answer:

24 if im correct

Step-by-step explanation:

Unit 10: Circles Homework 4: Inscribed Angles

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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).

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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

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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

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□ ÷ 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:

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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:

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

Linda bought 14 souvenirs during 7 days of vacation. How many days will Linda have to
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days

Answers

Answer:

10

Step-by-step explanation:

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:

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
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