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scoundrel [369]
3 years ago
12

HELP!!!!!!

Mathematics
1 answer:
wel3 years ago
7 0
(x - 4) * (x + 3) = 0
***************************************************************

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student randomly receive 1 of 4 versions(A, B, C, D) of a math test. What is the probability that at least 3 of the 5 student te
alexdok [17]

Answer:

1.2%

Step-by-step explanation:

We are given that the students receive different versions of the math namely A, B, C and D.

So, the probability that a student receives version A = \frac{1}{4}.

Thus, the probability that the student does not receive version A = 1-\frac{1}{4} = \frac{3}{4}.

So, the possibilities that at-least 3 out of 5 students receive version A are,

1) 3 receives version A and 2 does not receive version A

2) 4 receives version A and 1 does not receive version A

3) All 5 students receive version A

Then the probability that at-least 3 out of 5 students receive version A is given by,

\frac{1}{4}\times \frac{1}{4}\times \frac{1}{4}\times \frac{3}{4}\times \frac{3}{4}+\frac{1}{4}\times \frac{1}{4}\times \frac{1}{4}\times \frac{1}{4}\times \frac{3}{4}+\frac{1}{4}\times \frac{1}{4}\times \frac{1}{4}\times \frac{1}{4}\times \frac{1}{4}

= (\frac{1}{4})^3\times (\frac{3}{4})^2+(\frac{1}{4})^4\times (\frac{3}{4})+(\frac{1}{4})^5

= (\frac{1}{4})^3\times (\frac{3}{4})[\frac{3}{4}+\frac{1}{4}+(\frac{1}{4})^2]

= (\frac{3}{4^4})[1+\frac{1}{16}]

= (\frac{3}{256})[\frac{17}{16}]

= 0.01171875 × 1.0625

= 0.01245

Thus, the probability that at least 3 out of 5 students receive version A is 0.0124

So, in percent the probability is 0.0124 × 100 = 1.24%

To the nearest tenth, the required probability is 1.2%.

4 0
3 years ago
Given f(x) and g(x) are inverse functions. If f(-2)=1 then g(1)=-2<br><br> True<br><br> False
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True.

The y-axis of the f(x) must equal to the x-axis of g(x)

The x-axis of the f(x) must equal to the y-axis of g(x)

3 0
3 years ago
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The graphs below have the same shape. What is the equation of the blue<br> graph?
Harlamova29_29 [7]

Answer:

for this graph the answer is D

7 0
3 years ago
What is the standard deviation of the following data? If necessary, round your answer to two decimal places.
blsea [12.9K]
Total numbers=10
mean(average)=14.8
standard deviation=3.4254
variance_standard deviation)=11.73333
population standard deviation=3.24962
variance(population standard deviation)=10.56
3 0
3 years ago
Hayato watches a piece of gum Stuck to a clown’s bicycle tire as a steadily rotates, making 40 revolutions per minute. He starte
azamat

Answer to your Question:

- The Minimum Value will be 0

and

- The Maximum Value will be 30

Other Answers to This Quiz Include:

"What will be the y-intercept in Hayato's Graph"

Answer: 30

"How will he label the first four tick marks on the X-Axis?"

Answer: 0.375, 0.75, 1.125, 1.5

"Which Graph is the first cycle of Hayato's Graph?"

Answer: Picture Below.

"At Which Time could the clown have dropped the bowling Pins?"

Answer: 3.75 s

5 0
3 years ago
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