How does computer network work in a paragraph

All of the following are aspects of the search process except?

Alinara [238K]

d. select information is sent to the search engines database to be indexed.

8 0

3 years ago

A computer retail store has 15 personal computers in stock. A buyer wants to purchase 3 of them. Unknown to either the retail st

Dima020 [189]

Answer:

a. 1365 ways

b. Probability = 0.4096

c. Probability = 0.5904

Explanation:

Given

PCs = 15

Purchase = 3

Solving (a): Ways to select 4 computers out of 15, we make use of Combination formula as follows;

$^nC_r = \frac{n!}{(n-r)!r!}$

Where $n = 15\ and\ r = 4$

$^{15}C_4 = \frac{15!}{(15-4)!4!}$

$^{15}C_4 = \frac{15!}{11!4!}$

$^{15}C_4 = \frac{15 * 14 * 13 * 12 * 11!}{11! * 4 * 3 * 2 * 1}$

$^{15}C_4 = \frac{15 * 14 * 13 * 12}{4 * 3 * 2 * 1}$

$^{15}C_4 = \frac{32760}{24}$

$^{15}C_4 = 1365$

Hence, there are 1365 ways 

Solving (b): The probability that exactly 1 will be defective (from the selected 4)

First, we calculate the probability of a PC being defective (p) and probability of a PC not being defective (q)

From the given parameters; 3 out of 15 is detective;

So;

$p = 3/15$

$p = 0.2$

$q = 1 - p$

$q = 1 - 0.2$

$q = 0.8$

Solving further using binomial;

$(p + q)^n = p^n + ^nC_1p^{n-1}q + ^nC_2p^{n-2}q^2 + .....+q^n$

Where n = 4

For the probability that exactly 1 out of 4 will be defective, we make use of

$Probability = ^nC_3pq^3$

Substitute 4 for n, 0.2 for p and 0.8 for q

$Probability = ^4C_3 * 0.2 * 0.8^3$

$Probability = \frac{4!}{3!1!} * 0.2 * 0.8^3$

$Probability = 4 * 0.2 * 0.8^3$

$Probability = 0.4096$

Solving (c): Probability that at least one is defective;

In probability, opposite probability sums to 1;

Hence;

Probability that at least one is defective + Probability that at none is defective = 1

Probability that none is defective is calculated as thus;

$Probability = q^n$

Substitute 4 for n and 0.8 for q

$Probability = 0.8^4$

$Probability = 0.4096$

Substitute 0.4096 for Probability that at none is defective

Probability that at least one is defective + 0.4096= 1

Collect Like Terms

Probability = 1 - 0.4096

Probability = 0.5904

8 0

3 years ago

Transaction processing systems (TPSs) provide valuable input to management information systems, decision support systems, and kn

nadezda [96]

A transaction is a simple task carried out as part of corporate operations. Transaction processing systems (TPS) handle business transactions for the corporation, supporting overall enterprise operations.

A TPS creates papers pertaining to a non-inquiry transaction and records the transaction itself, together with all of its results, in the database.

Today, TPS are required for business operations in practically every firm. TPSs feed information into organizational databases; they also serve as the framework for management-oriented information systems. Source data automation frequently involves direct data entering. Electronic data interchange is being utilized by transaction processing systems more and more. These systems offer computer-to-computer communication without the need for repeated data entry by substituting paper documents with formatted transaction data sent over telecommunications networks.

Learn more about information here-

brainly.com/question/15709585

#SPJ4

5 0

1 year ago

Which of the following would not be considered a polymer?

miskamm [114]

Correct answer would be A) quartz. Plastic, nylon, and rubber can all be broken down or heated to make it expand, and be used in common products.

Hope this helped :)

3 0

3 years ago

Read 2 more answers

One problem with using e-mail is that ______. a. It can be perceived as being too casual b. It is never appropriate for business

Free_Kalibri [48]

I personally feel that e-mail can be used for more business settings and as a more formal approach to things as opposed to a text, but option C seems to be more of an opinion. I would go with C or D.

6 0

3 years ago