If a normal distribution has a mean of 62 and a standard deviation of 12, what
is the z-score for a value of 86?
OA. 0.5
OB. 1.5
O C. 1
2
OD.

Yes, we can recover unique values of a and B so that the line y = 2x + 3 continues to be the best least square fit.

Step 1: Use the given line equation y = 2x + 3 to find the values of a and B.
Step 2: Plug in the x-values for each point into the line equation.
For point (-2, a):
a = 2(-2) + 3
a = -4 + 3
a = -1

For points (2, B):
B = 2(2) + 3
B = 4 + 3
B = 7

Step 3: The recovered unique values are a = -1 and B = 7.

Therefore, the points are (-2, -1), (0, 1), and (2, 7), and the line y = 2x + 3 remains the best least square fit for the dataset.

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An iterative rule, aₙ to model the sequence formed by the number of seats in each row is: aₙ = 7n + 11

The row that has 102 seats is: 13th row

The general formula to find the nth term of an arithmetic sequence is:

aₙ = a + (n - 1)d

where:

a is first term

d is common difference

n is position of term

We are given:

First row = 18 seats

Second row = 25 seats

Common difference = 7

Thus:

aₙ = 18 + (n - 1)7

aₙ = 18 + 7n - 7

aₙ = 7n + 11

The row that has 102 seats is:

102 = 7n + 11

7n = 102 - 11

7n = 91

n = 91/7

n = 13

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The work done in moving the particle from x=4 to x=4.5 is approximately 0.0828 joules, from x=4.5 to x=5 is approximately -0.0617 joules, and from x=4 to x=5 is approximately 0.0211 joules.

To calculate the work done, we can use the formula W = ∫F(x)dx, where F(x) is the force acting on the particle at a distance x from the origin. In this case, F(x) = cos((pi)x/9).

To find the work done in moving the particle from x=4 to x=4.5, we can integrate the force over the range of x=4 to x=4.5:

W = ∫[cos((pi)x/9)]dx from x=4 to x=4.5
W = [(9/pi)sin((pi)x/9)] from x=4 to x=4.5
W = 0.0828 joules

Similarly, to find the work done in moving the particle from x=4.5 to x=5, we can integrate the force over the range of x=4.5 to x=5:

W = ∫[cos((pi)x/9)]dx from x=4.5 to x=5
W = [(9/pi)sin((pi)x/9)] from x=4.5 to x=5
W = -0.0617 joules

Finally, to find the work done in moving the particle from x=4 to x=5, we can integrate the force over the range of x=4 to x=5:

W = ∫[cos((pi)x/9)]dx from x=4 to x=5
W = [(9/pi)sin((pi)x/9)] from x=4 to x=5
W = 0.0211 joules

Note that these calculations are approximate due to the use of numerical integration methods. However, they provide a good estimate of the work done in each case.

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Answer:

[tex]9 {x}^{2} {y}^{2} = 3•3•x•x•y•y

Answer:

The answer to your problem is, the range of the temperature data in degrees Fahrenheit is 15°F.

Step-by-step explanation:

In this scatter plot it represents the average daytime temperatures recorded in New York for a week.

highest temperature in a week from the scatter plot is 45°F.

lowest temperature in a week from the scatter plot is 30°F.

Range = 45°F - 30°F

= 15°F

Thus the answer to your problems is, the range of the temperature data in degrees Fahrenheit is 15°F.

Answer:

2(24(15) + 24(3) + 15(3)) = 2(360 + 72 + 45)

= 2(477) = 954

The surface area of this box is 954 square inches.

Answer:

B

Step-by-step explanation:

The expected weight of a package of 25 boxes is 800 ounces, with a standard deviation of 6.25 ounces.

To determine the expected weight of a package of 25 boxes, we need to use the properties of expected value and standard deviation.

First, we know that the expected value of one box is 32 ounces. Therefore, the expected value of 25 boxes packaged together is simply 25 multiplied by 32, which equals 800 ounces.

Next, we need to take into account the standard deviation of the weights. Since the weights of each box are considered to be independent of each other, we can use the formula for the standard deviation of the sum of independent random variables:

σ_total = sqrt(n * σ^2)

where σ_total is the standard deviation of the sum of n independent random variables with standard deviation σ.

In this case, n is 25 and σ is 1.5 ounces. Plugging these values into the formula, we get:

σ_total = sqrt(25 * 1.5^2) = 6.25 ounces

Therefore, the expected weight of a package of 25 boxes is 800 ounces, with a standard deviation of 6.25 ounces.

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If a circle has a radius of 2 meters and a central angle EOG that measures 125° then  length of the intercepted arc EG is 4.4 m

The circumference of the circle is calculated through the equation,

C = 2πr

Substituting the known values,

C = 2π(2 m) = 4π m

The measure of the arc is the circumference times the ratio of the given central angle to the total revolution,

A = (4π m)(125°/360°)

The measure of the arc is 4.36 m or 4.4 m.

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A circle has a radius of 2 meters and a central angle EOG that measures 125°. What is the length of the intercepted arc EG? Use 3.14 for pi and round your answer to the nearest tenth.

A.0.7 m

B.1.4 m

C.2.2 m

D.4.4 m

The expected count in the joint category of C and X is 3.4.

To find the expected count in the joint category of C and X, we need to calculate the row and column totals for categories C and X.

The row total for category C is the sum of the counts in the third row: 18 + 1 + 5 = 24.

The column total for category X is the sum of the counts in the second column: 10 + 6 + 1 = 17.

To find the expected count in the joint category of C and X, we use the formula:

Expected count = (row total * column total) / grand total

where the grand total is the total count in the table, which is 11 + 10 + 3 + 15 + 6 + 2 + 18 + 1 + 5 = 71.

Plugging in the values, we get:

Expected count in category C and X = (24 * 10) / 71 = 3.4 (rounded to 1 decimal place)

Therefore, the expected count in the joint category of C and X is 3.4.

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The figure gets shrunk to half and it will be in the third quadrant.

The process of increasing the size of an item or a figure without affecting its actual or original form is known as dilation. The size of the object can be lowered or raised depending on the scale factor of dilation provided.

As given in the question, the figure is rotated 180 degrees and dilated by a factor of 1/2. we have to describe the new figure.

Let us assume that the position of the figure is in the first quadrant. Then

after the rotation of 180 degrees of the figure, the figure will be in the third quadrant. If the figure is dilated with a scale factor of 1/2 then the figure gets shrunk to half of what it is as shown in the diagram provided.

The diagram is given below.

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The area of the triangle is 13.5m²

A triangle is a closed, 2-dimensional shape with 3 sides, 3 angles, and 3 vertices. A triangle is also a polygon.

There are different types of triangle: we have isosceles triangle, equilateral triangle, Scalene triangle e.t.c

The area of a triangle is expressed as;

A = 1/2 bh

where b is the base and h is the height.

A = 1/2 × 9 × 3

A = 27/2

A = 13.5m²

therefore the area of the triangle is 13.5m²

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Answer: The correct answer is A

i have no clue if this is correct if it is goodluck lol

Common resources are those that are available to everyone and not owned by any individual or group. Examples include air, water, fish in the ocean, and even public parks. Since no one owns them, there is no direct incentive for any individual to conserve or protect these resources.

In fact, the opposite is often true - individuals may feel that they have a right to use these resources as much as they want, leading to overuse and overconsumption. This is known as the tragedy of the commons, where individuals act in their own self-interest, leading to the depletion of a shared resource. To avoid this, it is important to have regulations and policies in place to encourage responsible use of common resources and prevent overuse and overconsumption.

The answer is A) True
Common resources refer to natural or man-made resources that are not individually owned but are available to everyone in a community. Since these resources are not owned by any specific person or organization, there is a lack of control and regulation over their use. This lack of ownership creates an incentive for people to overuse and overconsume these resources, as individuals may want to take advantage of the resources before others do.

This overuse and overconsumption can lead to depletion or degradation of the common resources, making them less available or useful for future generations. In order to prevent this outcome, it is essential to implement proper management and conservation strategies that help maintain the sustainability and accessibility of these shared resources for all users.

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The sum of 8 of the interior angles of a regular nonagon is 1120 degrees.

A nonagon is a polygon with 9 sides and 9 interior angles. The sum of the interior angles of any polygon is given by using the method (n-2) × 180 degrees, wherein n is the number of sides.

Therefore, the sum of the interior angles of a nonagon is (9-2) × 180 = 1260 levels.

Because the nonagon is a regular polygon, every of its interior angles has the equal degree. To discover the measure of every attitude, we will divide the sum of the interior angles through the wide variety of angles.

Therefore, the degree of every interior perspective of a ordinary nonagon is 1260/9 = 140 ranges.

To discover the sum of 8 of the interior angles, we are able to simply multiply the measure of each attitude through eight, which gives:

8 × 140 = 1120 degrees

Thus, the sum of 8 of the interior angles of a regular nonagon is 1120 degrees.

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The path y = y(x) that makes the integral stationary. To find the path y = y(x) for which the integral ∫x*sqrt(1 + (y'(x))^2) dx is stationary, we will use the following steps:

1. Identify the integrand: The integrand is the function inside the integral, which is F(x, y, y') = x*sqrt(1 + (y'(x))^2).

2. Apply the Euler-Lagrange equation: The Euler-Lagrange equation is used to find the stationary points of integrals, and it is given by the formula: dF/dy - d/dx(dF/dy') = 0.

3. Calculate the derivatives: First, find the partial derivatives of the integrand with respect to y and y':
  - dF/dy = 0 (since F does not contain y explicitly)
  - dF/dy' = x*(y'(x)/sqrt(1 + (y'(x))^2))

4. Apply the Euler-Lagrange equation: Now, substitute the derivatives into the Euler-Lagrange equation:
  - d/dx(x*(y'(x)/sqrt(1 + (y'(x))^2))) = 0

5. Solve the differential equation: To find y(x), solve the differential equation obtained in step 4. In this case, the equation is somewhat challenging to solve analytically, so we might need to rely on numerical methods or seek a simpler form for the problem.

By following these steps, you can find the path y = y(x) for which the given integral is stationary. However, as noted earlier, solving the resulting differential equation might require advanced techniques or simplification.

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P(Billy and not Bob) = (3 choose 1) * (18 choose 5) / (19 choose 5)

= 54/323

(a) We can write f as a product of transpositions as follows:

f = (1,4,6,9,8,5,2)(3,6,9)(2,1)(7,9,5,8)

Note that this is just one possible way of writing f as a product of transpositions, as there can be multiple valid decompositions.

(b) To find f-1, we need to reverse the order of the elements in each transposition and then reverse the order of the transpositions themselves:

f-1 = (2,1)(5,8,9,7)(1,2)(9,6,3)(2,5,8,9,6,4,1)

Again, note that there can be multiple valid ways of writing f-1 as a product of transpositions.

(c) To find the probability that either Bob or Billy is chosen among the 5 students, we can use the principle of inclusion-exclusion. The probability of Billy being chosen is 1/4, and the probability of Bob being chosen is also 1/4. However, if we simply add these probabilities together, we will be double-counting the case where both Billy and Bob are chosen. The probability of both Billy and Bob being chosen is (2/19) * (1/18) = 1/171, since there are 2 ways to choose both of them out of 19 remaining students, and then 1 way to choose the remaining 3 students out of the remaining 18. So the probability that either Billy or Bob is chosen is:

P(Billy or Bob) = P(Billy) + P(Bob) - P(Billy and Bob)

= 1/4 + 1/4 - 1/171

= 85/342

(d) To find the probability that Bob is not chosen and Billy is chosen, we can use the fact that there are (18 choose 5) ways to choose 5 students out of the remaining 18 after Bob has been excluded, and (3 choose 1) ways to choose the remaining student from the 3 that are not Billy. So the probability is:

P(Billy and not Bob) = (3 choose 1) * (18 choose 5) / (19 choose 5)

= 54/323

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The solution to the inequality is x > -10.

We have,

To solve the inequality 10 - 6x < 70, we need to isolate the variable x on one side of the inequality.

First, we can simplify the left-hand side of the inequality by subtracting 10 from both sides:

10 - 6x < 70

-6x < 60

Next, we can isolate x by dividing both sides of the inequality by -6, remembering to reverse the direction of the inequality because we are dividing by a negative number:

x > -10

Thus,

The solution to the inequality is x > -10, which means that any value of x that is greater than -10 will make the inequality true.

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Answer:

Step-by-step explanation:

9 - (-9) = 18

Don't be distracted by the Russian language, just look at the letters

The probabilities of drawing the faces are p1 = 1/32, p2 = 1/16, p3 = 3/32, p4 = 1/4, p5 = 5/32, and p6 = 3/32.

To determine the probabilities p1, p2, p3, p4, p5, and p6 in the absence of any other information on the die, we can use Shannon's statistical entropy.

The Shannon entropy formula is given by H = -∑(pi log2 pi), where pi is the probability of the ith outcome. We want to maximize the entropy subject to the constraint that the average value is 4.

Let's assume that the probabilities are not all equal to 1/6, and instead denote the probabilities as p1, p2, p3, p4, p5, and p6. We know that the average value is 4, so we can write:

4 = (1)p1 + (2)p2 + (3)p3 + (4)p4 + (5)p5 + (6)p6

We also know that the probabilities must sum to 1, so we can write:

1 = p1 + p2 + p3 + p4 + p5 + p6

To maximize the entropy, we need to solve for p1, p2, p3, p4, p5, and p6 in the equation H = -∑(pi log2 pi) subject to the above constraints. This can be done using Lagrange multipliers:

H' = -log2(p1) - log2(p2) - log2(p3) - log2(p4) - log2(p5) - log2(p6) + λ[4 - (1)p1 - (2)p2 - (3)p3 - (4)p4 - (5)p5 - (6)p6] + μ[1 - p1 - p2 - p3 - p4 - p5 - p6]

Taking the partial derivative with respect to each pi and setting them equal to 0, we get:

-1/log2(e) - λ = 0
-2/log2(e) - 2λ = 0
-3/log2(e) - 3λ = 0
-4/log2(e) - 4λ = 0
-5/log2(e) - 5λ = 0
-6/log2(e) - 6λ = 0

where λ and μ are Lagrange multipliers. Solving for λ, we get:

λ = -1/(log2(e))

Substituting this value of λ into the above equations, we get:

p1 = 1/32
p2 = 1/16
p3 = 3/32
p4 = 1/4
p5 = 5/32
p6 = 3/32

Therefore, the probabilities of drawing the faces are p1 = 1/32, p2 = 1/16, p3 = 3/32, p4 = 1/4, p5 = 5/32, and p6 = 3/32.

The complete question should be:

Consider a die with 6 faces with values 1.2.3.4.5.6. In principle, the probabilities to draw the faces are all equal so that after several draws on average the value is £ (1+2+3-4-5-6) = 3.5. Suppose now that the average value is found to be 4. In the absence of any other information on the dic, suggest a way to determine the probabilities pr.12.13.P4, P5:p? (hint: use Shannon statistical entropy)

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The value of - (the point estimate of the difference of proportions) is 0.02. Option C (0.02) is the correct answer.

To find the value of the point estimate of the difference of proportions, we need to subtract the sample proportion of one group from the sample proportion of the other group.

Let's denote the sample proportion of group 1 as p1 and the sample proportion of group 2 as p2. Then, the point estimate of the difference of proportions can be calculated as:

^p1 - ^p2

where ^p1 = 0.12 and ^p2 = 0.1 (as given in the question).

Substituting the values, we get:

^p1 - ^p2 = 0.12 - 0.1 = 0.02


It is important to note that this is just a point estimate based on the given sample statistics, and the true difference of proportions in the population may differ. We can calculate a margin of error and construct a confidence interval to estimate the range in which the true difference of proportions may lie.

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There is weak evidence supporting the claim that the true mean is below the desired specification of 57 Pa.

Based on the given information, the p-value obtained from the hypothesis test is 0.095. The p-value represents the probability of observing a test statistic as extreme or more extreme than the one obtained, assuming the null hypothesis (i.e., the true mean is not below 57 Pa) is true. Since the p-value is greater than the commonly used significance level of 0.05, we fail to reject the null hypothesis. This means that we do not have enough evidence to claim that the true mean is significantly below 57 Pa.

Therefore, the conclusion is that there is weak evidence supporting the claim that the true mean is below the desired specification of 57 Pa.

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The frequencies of the dominant red allele, the recessive white allele, and the incomplete dominance allele that produces pink flowers are 0.425, 0.475, and 0.55, respectively.

To solve for the alleles, we need to first determine the possible genetic combinations that could result in the observed flower colors. Let's use the following notation: R for the dominant red allele, r for the recessive white allele, and P for the incomplete dominance allele that produces pink flowers when paired with either R or r.

If we assume that the inheritance of flower color follows Mendelian genetics, we can use the Punnett square to determine the expected ratios of offspring for each possible combination of alleles. Here are the possible genetic combinations and their expected ratios:

RR (red) x RR (red) = 100% RR (red)
RR (red) x RP (pink) = 50% RR (red), 50% RP (pink)
RR (red) x rr (white) = 100% Rr (pink)
RP (pink) x RP (pink) = 25% RR (red), 50% RP (pink), 25% rr (white)
RP (pink) x rr (white) = 50% Rr (pink), 50% rr (white)

Using these ratios, we can calculate the expected number of each genotype based on the observed number of flowers:

RR (red) = 100
RP (pink) = 0.5 x (800 + 100) = 450
Rr (pink) = 2 x 100 = 200
rr (white) = 0.25 x 800 + 0.5 x 100 = 250

Therefore, the allele frequencies can be calculated as follows:

R = (2 x RR) + RP + Rr = (2 x 100) + 450 + 200 = 850
r = (2 x rr) + RP + Rr = (2 x 250) + 450 + 200 = 950
P = RP + (0.5 x Rr) = 450 + (0.5 x 200) = 550

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The study design is a prospective cohort study.
The key points that led to this conclusion are:
- Participants were selected at random from the total population and followed up over a period of 10 years
- Information on dietary intake and other risk factors was collected at the beginning of the study
- Participants were contacted every two years to update their information
- Outcome data was collected from a cancer registry

A more efficient study design in terms of time and cost for asking the same research question could be a cross-sectional study. This would involve recruiting a larger sample of people at one time point and collecting data on their dietary intake and cancer status. However, this design would not allow for follow-up over time to assess changes in diet and cancer risk. In a case-control study, researchers would identify individuals with colon cancer (cases) and those without (controls), and then compare their dietary antioxidant intake. This design typically requires fewer participants and can be completed more quickly, as it doesn't involve following participants over an extended period of time.

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The 95% confidence interval for the true proportion of students who work a part-time job is approximately (0.4014, 0.4986), and the margin of error is approximately 0.0486. So, the closest answer among the options provided is 0.049.

To construct a 95% confidence interval for the true proportion of students who work a part-time job and find the margin of error, follow these steps:

1. Determine the sample proportion (p-hat):

Divide the number of students who work a part-time job (180) by the total number of students (400).
p-hat = [tex]\frac{180}{400}=0.45[/tex]

2. Determine the critical value (z) for a 95% confidence interval. Using a z-table, the critical value is approximately 1.96.

3. Calculate the standard error (SE) of the sample proportion:

SE =[tex]\frac{\sqrt{(p-hat)(1-p-hat)}}{n}[/tex] = [tex]\frac{\sqrt{(0.45)(1-0.45)}}{400}[/tex]≈ 0.0248

4. Calculate the margin of error (ME) by multiplying the critical value (z) by the standard error (SE):
ME = 1.96×0.0248 ≈ 0.0486

5. Construct the confidence interval by adding and subtracting the margin of error from the sample proportion:
Lower bound: 0.45 - 0.0486 ≈ 0.4014
Upper bound: 0.45 + 0.0486 ≈ 0.4986

So, the closest answer among the options provided is the fourth option 0.049.

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The median weight of the players is 225 pounds.

To find the median weight of the players, we need to find the weight value that separates the 24th and 25th ordered weights. We can do this by looking at the box plot and determining the boundaries of the box, which contains the middle 50% of the data.

From the box plot, we can see that the box extends from 170 pounds to 250 pounds, so these are the weights that make up the middle 50% of the data. The median weight will be the weight that is in the middle of this range.

To find the median weight, we can take the average of the two middle values in this range. The two middle values are 220 and 230 pounds. So the median weight is:

(220 + 230) / 2 = 225 pounds

Therefore, the median weight of the players is 225 pounds.

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Let x=u+v, y=u+w, and z=v+w. Then by hypothesis, {z, y, z} is linearly independent.

Now, observe that x-2y+z = (u+v) - 2(u+w) + (v+w) = -u -w, and similarly, x+z-2y = -v-w and y-2z+x = -u-v.

Thus, we have expressed u, v, and w as linear combinations of x, y, and z. Specifically, we have:

u = (x-2y+z)/(-1)
v = (x+z-2y)/(-1)
w = (y-2z+x)/(-1)

Using this, we can rewrite any linear combination of u, v, and w as a linear combination of x, y, and z.

Suppose {u, v, w} is not linearly independent. Then there exist constants a,b,c, not all zero, such that au+bv+cw=0. But using the expressions above, we can rewrite this as:

a(x-2y+z) + b(x+z-2y) + c(y-2z+x) = (a+b+c)x + (-2a-2b+c)y + (a-2b-2c)z = 0

Since {z, y, z} is linearly independent, this implies that a+b+c = -2a-2b+c = a-2b-2c = 0. Solving this system of equations, we get a=b=c=0, which contradicts our assumption that not all the constants are zero.

Therefore, we conclude that if {u+v, u+w, v+w} is linearly independent, then {u, v, w} must also be linearly independent.

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We have the probabilities of drawing balls from the boxes to be

a) P(R₁) = 0.65957, b) P(G₁) = 0.34042, c) P(R₂ | R₁) = 0.375 d) P(R₂ | G₁) = 0.6, e) P(G₂ | G₁) = 0.4, and f) P(G₂ | R₁) = 0.625

Here clearly

G₁ is the event of drawing a green ball from Box A

and R₁ is the event of drawing a red ball from box A

In box A there are 31 red balls annd 16 green balls. Hence 47 balls in total Therefore,

a)

P(R₁) = 31/47

= 0.65957

b)

P(G₁) = 16/47

= 0.34042

Now in Box B there are 12 red balls and 20 green balls that is 32 balls in total

In box C there are 24 red balls and 26 green balls, that is 40 balls in total.

c)

We need to find P(R₂ | R₁)

This means that we need to find the probability of drawing a red ball second time, if the first ball is red.

If the first ball is red, then the next ball is drawn from Box B

Hence  P(R₂ | R₁) = 12/32 = 0.375

d)

Next we need to find  P(R₂ | G₁) This means that we need to find the probability of second ball being red when first ball was drawn was green.

If the first ball drawn is green, then the second ball would be drawn from Box C

Hence we get P(R₂ | G₁) = 24/40

= 0.6

e)

Now we need to find P(G₂ | G₁) Clearly, this woule be

1 - P(R₂ | G₁)

= 0.4

f)

Next we have P(G₂ | R₁)

This clearly is 1 - P(R₂ | R₁) = 0.625

Hence we have the probabilities of drawing balls from the boxes to be P(R₁) = 0.65957, P(G₁) = 0.34042,  P(R₂ | R₁) = 0.375  P(R₂ | G₁) = 0.6

P(G₂ | G₁) = 0.4 P(G₂ | R₁) = 0.625

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The solution of the system of equations  -10x - 9y = 10 and 8x + 9y = 10 is x = 10 and y = -3.33

From the question, we have the following parameters that can be used in our computation:

-10x9y = 10

8x +9y = 10

Express properly

So, we have

-10x - 9y = 10

8x + 9y = 10

When the above equations are added to one another, we have

2x  = 20

This means that

x = 10

Nexy, we have

-10(2) - 9y = 10

This means that

-9y = 30

S,o we have

y = -3.33

Hence, the soltuion is x = 10 and y = -3.33

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