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3 years ago

Primary technology skills are skills that are necessary for success in online education

Computers and Technology

2 answers:

damaskus [11]3 years ago

6 0

Answer:

True is the correct answer.

Explanation:

Snezhnost [94]3 years ago

3 0

Answer:

true is the correct answer

Explanation:

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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

The flagging of an uncommon last name as a spelling error can be stopped by opening the shortcut menu on the first occurrence of

Mice21 [21]

Solution:

The flagging of an uncommon last name as a spelling error can be stopped by opening the shortcut menu on the first occurrence of the name and selecting of ignoring all.

Thus the required right answer is B.

8 0

3 years ago

In which of the following situations may you pass on the right

Natasha2012 [34]

In driving your vehicle, it is best to pass on the right after you slow your vehicle down and check for the road whether there is an upcoming vehicle or not. When the road is clear, it is best and safe to pass on the right after making sure that the coast is clear.

3 0

3 years ago

Read 2 more answers

Investigate the many ways that hardware and software can cause an interrupt to occur. Are ALL interrupts treated equally or do s

slavikrds [6]

Answer:

Following are the responses to the given question:

Explanation:

This list is based mostly on the processor. Then you'll be ordered. An interrupt of a particular cable (wire) is produced for PC-ish CPUs (IRQ 0 - 31 for some intel processors). The bigger challenge is a lower number.

Strange factors have included a system clock, power business, 0, some reserved for use by CPU testing, serial/parallel/... ports and also some terminated/error/state/new devices requests device Thus a key touch on the keyboards could create an interrupt that was direct on old devices.

3 0

2 years ago

A data visualization tool that updates in real time and gives multiple outputs is called

strojnjashka [21]

Answer:

A data dashboard

Explanation:

3 0

2 years ago