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Helen
11 days ago
8

About ten percent of users do not close Windows properly. Suppose that Windows is installed in a public library that is used by

random people in a random order. (a) On the average, how many users of this computer do not close Windows properly before someone does close it properly? (b) What is the probability that exactly 8 of the next 10 users will close Windows properly?
Mathematics
1 answer:
lawyer [4K]11 days ago
6 0

Answer:

Refer to the explanation

Step-by-step explanation:

As approximately 10% of users fail to close Windows properly, we determine:

  • The likelihood that a user neglects to shut down Windows correctly is p=0.1;
  • The likelihood that a user shuts the Windows properly is q=1-p=1-0.1=0.9.

A. On average,

  • one in ten users does not close Windows correctly;
  • 10 out of 100 users fail to close Windows correctly.

B. The likelihood that precisely 8 out of the next 10 users will close Windows correctly is

C^{10}_8\cdot q^{8}p^{10-8}=\dfrac{10!}{8!(10-8)!}\cdot (0.9)^8\cdot (0.1)^2=45\cdot (0.9)^8\cdot (0.1)^2\approx 0.1937

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Expiration Date: 1/17/2017

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8 0
17 days ago
The length if Marshall's rectangular poster is 2 times its width.If the perimeter is 24 inches, what is the area of the poster.
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First, we need to determine the dimensions of the rectangle, specifically its length and width.

We can derive this equation:
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Next, we will calculate the area of the rectangle.
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Area=(8 in)(4 in)=32 in²

Conclusion: The area of Marshall's rectangular poster is 32 in².

4 0
9 days ago
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