Answer:
It should be 10%
Which is the expected value of the random variable with given probability distribution ?
Answer:
Step-by-step explanation:
Let X be the RV we are talking about.
Expected value has different aliases, such as weighted average, mean, expectation, first moment and so on.
Okay, how do we calculate the average first, just sum all the values and divide by number of values. It comes from the basic assumption, which is choosing one of them is equally likely. What I mean by that is quite simple, above process what I talked about is just sum of the numbers times their probabilities. e.g. (a+b+c+d)/4 = a/4 + b/4 + c/4 + d/4. In the example, we assumed that probability of choosing any a, b, c and d is equally likely.
Then, why I use the term weighted average is the generalized situation of average, which is some of the numbers are repetitive. For instance, X can take the values a, b, c and d; however, X can take the value a 3 times more than d, X can take the value b 2 times more than d and c and d occurs with the same frequency at X, Therefore, if we take a sample, it is likely to be a, b, a, c, d, a, b or the permutation of this sample. Therefore the weighted average is 3 * a / 7 + 2 * b / 7 + c / 7 + d /7 or using normal average theorem (a + a + a + b + b + c +d) / 7. First, both of them are equal. Find the distribution and multiply the values with the probabilities of the distribution and sum them up or just add them and divide by number of sample. Second, if you check that, a has more weight, which means a can determine the direction of the average more. That is the logic behind the expected value.
Now, if X is a discrete RV (like in the above example), we know what we are going to do. What if X is a continuous RV ? X could take infinite values therefore if you divide a number with an infinite value, the probability of an individual value X could take is going to be 0. Therefore, we cannot calculate the expected value of chosen values individually; however, we can calculate the expected value of an interval by approximating with Riemann Sum or with a better choice, using integrals. Because, technically using Riemann Sum and quantizing the values and approximating the area of the curve is the same as we did above.
In conclusion, basically if X is a discrete RV and the values X could take is countably infinite,
If X is a discrete RV and the values X could take is finite,
if X is a continuous RV,
A farmer planted corn in a square field. One side of the field measures 37 yards. What is the area of the cornfield
Answer:
1,369 cm^2
Step-by-step explanation:
A square is a two-dimensional shape with four right angles and four equal sides.
This means each and every side is equal.
In this case, every side is 37 yards.
To find the area of a square, simply multiply a length of a side by itself.
Like this,
37⋅37 = 1,369.
Therefore, the area of the cornfield is 1,369 yards cm^2.
the area of this figure is ? square inches
Answer:
946 sq inches
Step-by-step explanation:
28*7=196
30*25=750
750+196=946 i think thats how you do it lol
(=^w^=)
Answer:
946
Hope this helps!!!!!! :)
Line segment ĀB has endpoints of A(-3,7) ans B(3,15). Identify the slope of a line perpendicular to ĀB
Answer:
m = -3/4
Step-by-step explanation:
Let's look at how much x and y change as we move from A to B:
x increases by 6, from -3 to 3, and y increases by 8, from 7 to 15. Thus, the slope, m, is rise / run, or (change in y): m = 8/6 = 4/3.
Now any line perpendicular to AB has a slope which is the negative reciprocal of this 4/3: m = -3/4
WILL GIVE BRAINLIEST
Simplify the following expression when x=14 y=10 z=6 .
3x+3y divided by z
Answer:
12
Step-by-step explanation:
1. Substitute each letter with the numbers given
3(14) + 3(10) / 6
42 + 30 = 72 / 6 = 12
The range of which function is (2,infinite)
Answer:
The last one
Step-by-step explanation:
Maria walks 16 meters every 10 seconds how far does she walk in 45 seconds?
Answer:
72 m
Step-by-step explanation:
The unit rate is
16 m
----------- = 1.6 m/sec
10 sec
and so, in 45 sec, Maria walks:
(1.6 m/sec)(45 sec) = 72 m
Orly uses 2 cups of raisins for every 8 cups of trail mix she makes. How many cups of trail mix will she make if she uses 10 cups of raisins?
A. 12 cups
B.2 cups
C.8 cups
D.40 cups
Answer:
D. 40 cups
Step-by-step explanation:
10÷2=5
5×8=40
She will use 40 cups of trail mix
Can Someone Help Me With This:
I need the answer please
Answer:
Segment 4 cm is congruent
A bike rental company charges $18 to rent a bike plus $8 for each hour the bike is rented. An expression for the total cost of renting a bike for h hours is 18 + 8h.
Complete the table to find the total cost of renting a bike for h hours.
write the mixed number 9 and 1/12 as a decimal
Hey there!
“Write 9 1/12 as a decimal”
9(12) + 1 / 12
9(12) = 108
108 + 1/ 12
108 + 1 = 109
109/12
109/12 = 9.083
Answer: 9.083
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)
Please answer for brainliest
Answer:
Step-by-step explanation
+ \ x -
allie has 1 jar of peanut butter that cost 32 cents per ounce. there are 5 ounces in the jar. how much does the jar cost?
Answer:
The peanut butter jar costs 1.60 cents
Step-by-step explanation:
Answer: 160=$1 and 60cents
Right triangles 1-2 and 3 are given with all their angle measures and approximate side lengths.
Use one of the triangles to approximate the ratio WY/WX
A. 0.34
B. 0.94
C. 1.06
D. 2.76
Answer:
0.34
Step-by-step explanation:
Considering the right-angled triangle XYW, an approximate ratio WY/WX is equal to 0.34. The correct option is A.
What is a right-angled triangle?A right triangle is a triangle in which one of the angles is at a right angle or two of the sides are perpendicular, or more formally, an orthogonal triangle, formerly known as a rectangle triangle. The foundation of trigonometry is the relationship between the sides and various angles of the right triangle.
Considering the right-angled triangle XYW, we would apply the law of cosine to approximate the ratio WY/WX. Mathematically, the law of cosine is given by:
cos(θ) = Adj/Hyp
Where:
Adj is the adjacent side of a right-angled triangle.
Hyp is the hypotenuse of a right-angled triangle.
θ is the angle.
Substituting the given parameters into the formula, we have;
cos(θ) = WY/WX
cos(70) = 3.4/10
0.34 = 0.34.
Therefore, the correct option is A.
Read more on triangle ratio here:
brainly.com/question/26060091
#SPJ5
ERROR ANALYSIS Describe the error in determining whether the lines are parallel, perpendicular, or neither.
Line 1: (3,-5),(2, -1)
Line 2: (0,3),(1,7)
There is a sign error in finding m
The slopes of perpendicular lines are negative reciprocals of each other.
Two lines are parallel when their slopes have the same absolute value.
In Line 2, one point is on the x-axis, so only the y-values should be subtracted to find the slope.
Answer:
3rd one
Step-by-step explanation:
It is the most reasonable answer
Which is cheaper?
A) $15 for 500ml
B) $40 for 1.5L
Answer: The answer is A i think
Step-by-step explanation:
un campo de futbol tiene 100m de largo y 60m de ancho¿ Cuales son la longitud y la anchura del campo?
Answer:
328 pies de largo
196.8 pies de ancho
Step-by-step explanation:
Ya que las medidas dadas estan en metros, podemos usar esas medidas para calcular la longitud y anchura en pies.
100 metros de largo.
60 metros de ancho.
Si sabemos que 1m es igual a 3,28 pies, simplemente tenemos que multiplicar las medidas en metros por 3.28 y nos va dar la medida del campo en pies.
100 * 3.28 = 328 pies de largo
60 * 3.28 = 196.8 pies de ancho
What is the distance between (2,3) and (-2,7)? Round to the nearest tenth
Answer:
Step-by-step explanation:
distance = [tex]\sqrt{(7-3)^2+(-2-2)^2[/tex] = [tex]\sqrt{16+16} = \sqrt{32}[/tex], which is approximately 5.65685
Answer:
5.7
Step-by-step explanation:
[tex] \sqrt{(2 + 2) {}^{2} + (3 - 7) {}^{2} } = \sqrt{ {4}^{2} + {4}^{2} } = \sqrt{16 + 16} = \sqrt{32} = 4 \sqrt{2} = 5.7[/tex]
Calculate the mean and range of the following sample:
7 12 15 16 21 31 22 25 11
Answer:
Mean: 17,78
Step-by-step explanation
Add up all the numbers then divide by how many numbers there are
Basically divide by the count.
HELP ASAP, PLZZZZZ
Holli's house is located at (−1, 4). She can walk in a straight line to get to Jedd's house. A fast food restaurant is located at (−3, 2) and partitions the way from Holli's house to Jedd's house by a ratio of 1:2. Find the coordinate of Jedd's house.
(−2, 3)
(−4, 1)
(−5, 0)
(−7, −2)
Answer:
Answer C: -5,0
Step-by-step explanation:
I'm probs way late, but there's your answer. Good luck to future exeminese!
(−4, 1)
I pretty sure its B so there you go
Find the 11th term of the geometric sequence 1,3,9, ...
Answer:
27,81, 243
Step-by-step explanation:
Answer:
59049
Step-by-step explanation:
PLEASE HELP Question 3
Segment PR and segment QS are diameters of circle U. Find measure of
arc TQR.
Answer:
74
Step-by-step explanation:
42+64=106
180-106=74
Plzz help will mark brainliest plz don't do it for the points plzz!!!!!!!!!!!!!
Answer:
the first choice is the correct answer
Hillary is making a blanket for her mom. Three fourths of the blanket is green and the rest is yellow. Two thirds of the yellow part has her name on it. What fraction of the blanket will, have her name on it?
Answer:
1/6
Step-by-step explanation:
Hillary is making a blanket for her mom.
Let the total blanket = 1
Three-fourths of the blanket is green and the rest is yellow.
The fraction for the rest(yellow portion) = 1 - 3/4
The Lowest Common Denominator is 4
Hence,
4 - 3 /4 = 1/4
Two-thirds of the yellow part has her name on it.
The fraction of the blanket that will have her name on it is calculated as
2/3 of 1 /4
= 2/3 × 1/4
= 1/6
Find the value of the missing angle x.
85
68
Answer:
hey so the angles in a triangle add up to 180°.
take your given angles away from that to find your 3rd angle
180-68-85-27°
angles on a straight line also add up to 180°
so you need to take 27 from 180 to find your answer
180-27=153°
Rachel is driving at 48mph. She sees an accident directly ahead of her about 200 feet away. Will she be able to stop in time?
Fill in the missing number.______cm=1 meter
Answer:
100
Step-by-step explanation:
Find the height of a trainable with an area of 22 square inches and a base of 4 inches. Include the measurement of the shape in your answer. First who gets it right gets brainliest
Answer:
The height is 11 in
Step-by-step explanation:
I think you mean triangle?
area of a triangle is A = 1/2 b h
fill in and solve for h
22 = 1/2 4 h
44 = 4h
11 = h
I NEED HELP ASAP GEOMETRY 10TH GRADE
Answer:
(14, -7)
Step-by-step explanation: