The probability of being a universal donor is 6% (O-negative-blood type). Suppose that 6 people come to a blood drive.' a) What are the mean and standard deviation of the number of universal donors among the 6 people? b) What is the probability that there are exactly three universal donors?

Answers

Answer 1

Answer:

[tex]Mean = 0.36[/tex]

[tex]SD = 0.5817[/tex]

[tex]P(x=3) = 0.003588[/tex]

Step-by-step explanation:

Given

Let

A = Event of being a universal donor.

So:

[tex]P(A) = 0.06[/tex]

[tex]n = 6[/tex]

Solving (a): Mean and Standard deviation.

The mean is:

[tex]Mean = np[/tex]

[tex]Mean = 6 * 0.06[/tex]

[tex]Mean = 0.36[/tex]

The standard deviation is:

[tex]SD = \sqrt{np(1-p)}[/tex]

[tex]SD = \sqrt{6*0.06*(1-0.06)}[/tex]

[tex]SD = \sqrt{0.3384}[/tex]

[tex]SD = 0.5817[/tex]

Solving (b): P(x = 3)

The event is a binomial event an dthe probability is calculated as:

[tex]P(x) = ^nC_x * p^x * (1-p)^{n-x}[/tex]

So, we have:

[tex]P(x=3) = ^6C_3 * 0.06^3 * (1-0.06)^{6-3}[/tex]

[tex]P(x=3) = ^6C_3 * 0.06^3 * (1-0.06)^3[/tex]

[tex]P(x=3) = 20 * 0.06^3 * (1-0.06)^3[/tex]

[tex]P(x=3) = 0.003588[/tex]


Related Questions

please help!!
thank you !!​

Answers

Remember, triangles add up to 180 degrees.

180-(96+67)=17.

A is 17 degrees.

Hope this helped!

A wooden cabinet is in the shape of a rectangular prism. Its base area and height are 10/12m2 and 2/3m, respectively. What volume does the cabinet occupy? A. 5/9m3 B. 1 4/5m3 C. 4/5m3 D. 1/3m3

Answers

Answer:

A

Step-by-step explanation:

yan po ang sagot ko sana po makatulong

How do you solve this ? ​

Answers

Angles D and E are equal to 80.
Angles B and C are equal to 80.
The shape is equal to 360 degrees.
We have D is 153 to find E subtract 180 from 153 to get 27.
To find C subtract 180 from 97 to get 83.

please help me with this!
NO BOTS!

Answers

Answer:

10x+100

Step-by-step explanation:

(x+10)10

(x)(10)+(10)(10)

10x+100

Answer:

21 :)

Step-by-step explanation:

BECAUSE IT IS 21 OK ;)

The value of the computer decreases 7% every month. What is the
multiplier?

a) 7
b) 1.07
c) 0.93
d) 0.7

Answers

Pretty sure the answer is A

The Munn Sugar Processing Plant is able to process 10 tons of sugar
per month. Assuming that this process stays steady, is this example
linear or exponential?

Answers

Answer:

Its Linear

Step-by-step explanation:

Linear!

HELP ME FASTTTTTTT !!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

50 degrees ( Vertically opposite)

Hope it helps

Step-by-step explanation:

4. White Mountain National Forest covers more than 780,000 acres. One-seventh of the forest is reserved as
wilderness. Approximately how many acres are in the wilderness area?
A. 400,000
B. 320,000
C. 260,000
D. 110,000

Answers

Answer:

D.

Step-by-step explanation:

If you trying to find 1/7 of a number, divide by 7.

780,000/7 = 111428

It says approximately so it won't be the exact answer

Nana has 3/6 of a cherry pie left. If she gives her six grandchildren an equal piece, how much will each child get?

Answers

answer: 1/12 or 0.083

a 15 foot ladder leans against a wall and makes an angle of 65 degrees with the ground. what is the horizontal distance from the wall to the base of the ladder o the nearest tenth of a foot

Answers

Answer: 6.3

Step-by-step explanation:

Help me pls TwT I am terrible at math

Answers

Answer:

It should be B:)

Step-by-step explanation:

PLZ HELP!!!

What is 9 + 10?

Answers

The answer is 19 lol

Answer:

21.

Step-by-step explanation:

M a t h .

determine the equation that is represented by the table below. x 3 4 5 6 y -3 0 3 6 can some one answer please

Answers

could you maybe be more specific as to what this is talking about ?

A park has a large pond and a small pond as shown.
large pond
small pond
• Each pond is in the shape of a circle.
• The radius of the large pond is 4 times the radius of the small pond.
Based on this information, which of the following statements is TRUE?
O A The area of the large pond is 16 times the area of the small pond.
OB. The area of the large pond is 4 times the area of the small pond.
C. The area of the large pond is 2 times the area of the small pond.
Type here to search
O
RI

Answers

Answer:

A The area of the large pond is 16 times the area of the small pond.

Step-by-step explanation:

Small pond for theradius to

statements.

In this case

•- A : 41T -7 you can I'm using 2.

Large Pond '

A- = ITCH.

2)Z pi . (t)

"

a- it 82 530 Divide

A = 64 IT we are looking

for " how many

times

larger.

"

Can you please help me

Answers

Step-by-step explanation:

there is the answers for this one

The dot plot shows a random sample of the number of fish caught and released by 30 participants during a two-day fishing derby.

Answers

Answer:

The total number of fish caught was 42

Step-by-step explanation:

Ruth uses healthy credit to finance $2,200 for a hearing aid how much would she have to pay each month to pay back the loan in exactly 1 year

Answers

Answer:

$183.3

Step-by-step explanation:

Ruth uses healthy credit to finance $2,200 for a hearing aid how much would she have to pay each month to pay back the loan in exactly 1 year

Ruth took a loan of $2,200

1 year = 12 months

Hence, the amount she would be paying monthly is calculated as:

$2,200/12 months

= $2,200/12

= $183.33333333

Approximately = $183.3

Therefore, Ruth would be paying $183.3 monthly.

rene completed a 10 mile run in 1 hour and 20 minutes. Which calculation would give her average speed (mph)

Answers

Answer:

7.5 mph

Step-by-step explanation:

Given :

Distance traveled in miles = 10 miles

Time taken = 1 hour 20 minutes

In other to express average speed on terms of miles per hour :

Time in hour = 80 / 60 = 1.333333 hours

Average speed = Distance traveled / time taken

Distance = 10 miles / 1.33333 hours

Distance = 7.5 miles per hour

Which graph represent it Y=-2x+1 y=-2x^+1

Answers

i don’t see a foto

Explanation:

Answer:

theres no graph my dude. consider re-uploading your question

A number x, rounded to 2 decimal places is 7.42 write down the error interval for x

Answers

Answer:

7.415 ≤ x < 7.425

Step-by-step explanation:

The number x was rounded to 2 decimal places to give 7.42.

Since rounded off to 2 decimal places, the error interval for x is half of 0.01 subtracted from and added to 7.42.

Thus;

7.42 ± (0.01/2)

(7.42 - 0.005),(7.42 + 0.005)

7.415, 7.425

Now, 7.425 will not be included in the internal because approximating it doesn't give 7.42.

Thus,the error interval is;

7.415 ≤ x < 7.425

What percent of 48 is 12?

Answers

Answer:

5.76

Step-by-step explanation:

What is 12 percent (calculated percentage %) of number 48? Answer: 5.76.

Welcome for the answer. This answer is for good intentions only please don't report unless necessary. Have a great rest of your day!

Help me please! Write the measure of angles a, b, c, d, e, f, and g for the figure below.
I need help and answers. NO LINKS PLEASE! Thank you! I'll give 10 points and brainliest.

Answers

Answer:

a=55

b=55

c=125

d=125

e=55

f=55

g=125

Step-by-step explanation:

Answer:

∠a = 55°, ∠b = 55°, ∠c = 125°, ∠d = 125°, ∠e = 55°, ∠f = 55°, ∠g = 125°

Step-by-step explanation:

straight lines form 180°:

125° + ∠a = 180°

=> ∠a = 55°

verticle angles are congruent:

∠c = 125°

∠b ≅ ∠a => ∠b = 55°

When two line are parallel:

same side interior angles are congruent:

∠g ≅ ∠c => ∠g = 125°

∠e ≅ ∠a => ∠e = 55°

∠d = 125°

∠ f ≅ ∠b => ∠f = 55°

A casserole recipe calls for 8 ounces of cheese. Adrian wants to use 1/2 of the amount of cheese in his casseroles.

How many pounds of cheese does he need to make 22 casseroles with his revised recipe?

Answers

Answer:

88 Ounces

Step-by-step explanation:

1/2 of 8 is 4. 22 times 4 is 88.

what fraction is equivalent to 6/10 and has a denominator of 100

Answers

Answer:

The correct answer is 60/100.

Step-by-step explanation:

6 x 10 is 60 so all you have to do is add 100 as the denominator so that's why I got 60/100 Thank you!

A fraction is a way to describe a part of a whole. The fraction is equivalent to 6/10 and has a denominator of 100 is 6/10.

What is a Fraction?

A fraction is a way to describe a part of a whole. such as the fraction ¼ can be described as 0.25.

The fraction is equivalent to 6/10 and has a denominator of 100 will be,

6/10

Multiply both the numerator and the denominator by 10.

= 6/10 × 10/10

= 60/100

Hence, The fraction is equivalent to 6/10 and has a denominator of 100 is 6/10.

Learn more about Fraction:

https://brainly.com/question/1301963

#SPJ2

PLEASE ANSWER THIS!!

Answers

Answer:

161ft^2 is answer

Step-by-step explanation:

area of rectangle = l ×b

=7ft ×23ft

=161ft^2

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A map is placed on a coordinate grid. on the map, city 1 is located at (35,78) and city 2 is located at the point (47,122). If each unit is equivalent to 1 mile, how far apart are the cities?

A. (82,100)
B. (41,100)
C. (6,22)
D. (12,44)

Answers

Answer:

D

Step-by-step explanation:

Firstly, the question is phrased very very badly as the four answers provided are coordinate points rather than how far apart the cities are in units.

To calculate the distance between two points, we have to use Pythagoras' Theorem as it's just pretty much a right-angle triangle. Please look at the (terribly drawn) image provided.

Keep in mind that these points are only roughly placed on the map.

But firstly, to use Pythagoras' Theorem (a^2 + b^2 = c^2), we must find the length of the two sides.

To find the length of the horizontal line (which from now on I'll refer to as 'a'), we must subtract the smaller x value from the larger one.

47 - 35 = 12

To find the length of the vertical line (which from now on I'll refer to as 'b'), we must subtract the smaller y value from the larger one.

122 - 78 = 44

I assume that the answer you should pick is D. (12, 44)

However, that doesn't exactly answer the question... it's worded a little weirdly.

To solve the rest of the equation, do the following:

Now that we know that the length of a = 12 and the length of b = 44, we can use Pythagoras' Theorem.

a^2 + b^2 = c^2

12^2 + 44^2 = c^2

144 + 1936 = c^2

2080 = c^2

c = [tex]\sqrt{2080}[/tex]

c = 45.61

The answer is 45.61 units.

Please answer the five math questions. No links

Answers

Answer:

1. sin and cos  2. complementary  3. sinA = cosB  4. 80°  5. 17

Step-by-step explanation:

1. cofunctions: having the same value at complementary angles

sin θ = cos (90 - θ), or  cos θ = sin(90 - θ)

2. complementary: two angles sum to 90°, supplementary: two angles sum to 180°

one of the angle in a right triangle must be a right angle = 90°

180°(sum of angles of a triangle) - 90° = 90°(the sum of the other two angles) => which is complementary

3. sinA = cosB

4. cos θ = sin(90 - θ)

=> cos 10° = sin(90 - 10°)

=> cos 10° = sin(80°)

5. sin θ = cos (90 - θ)

=> sin 73° = cos (90 - 73°)

=> sin 73° = cos (17°)

Carlos cut StartFraction 5 Over 12 EndFraction of a yard of cloth into 5 pieces of equal length. What was the length of each piece of cloth?

Answers

Answer:

Each piece of cloth is (1/12) of a yard long.

Step-by-step explanation:

Carlus cut 5/12 of a yard of cloth into 5 pieces of equal length.

To find the length of each piece of cloth, we need to find the quotient between the length of the piece of cloth, and the number of pieces in which we divide it.

This is:

length = [tex]\frac{(5/12)yd}{5} = \frac{5yd}{12*5} = \frac{1yd}{12} \frac{5}{5} = \frac{1 }{12} yd[/tex]

This means that the length of each piece of cloth is (1/12) of a yard long.

Answer:

1/12 trust,

because yes. >3

2022 / 2023

A gate is made up of a rectangle and a semicircle, as shown. Find the area of the gate. 6 ft Show your work. K к 8 ft Solution:​

Answers

Answer:

73.12 ft²

Step-by-step explanation:

area = (8 x 6) + [(1/2)(3.14)(4²)] = 73.12 ft²

Brody just got hired for a new job and will make \$37,000$37,000 in his first year. Brody was told that he can expect to get raises of \$2,000$2,000 every year going forward. How much money in salary would Brody make in his 29th year working at this job?

Answers

Answer:

93000

Step-by-step explanation:

a29 = 93000

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