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2 years ago

1. You have a light in your living room that you can turn on or off from either (A) the living room, or (B) the kitchen.

Computers and Technology

1 answer:

Ksenya-84 [330]2 years ago

3 0

Answer:

Table lamps or floor lamps with an adjustable head are the ideal fixtures for providing task lighting in living rooms.

Explanation:

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Hardware refers to programs and protocols used on a computer system. True False

lapo4ka [179]

Answer:

False

Explanation:

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2 years ago

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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

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3 years ago

Which of the following statements is false? a. Racks and bins are examples of storage equipment. b. Automation refers to equipme

svp [43]

Answer:

b. Automation refers to equipment that complements, rather than replaces, human contact.

3 0

3 years ago

Which command group on the Slide Master tab is used to add headers, footers, and other placeholders to the slide

Vikki [24]

Answer:D

Explanation:

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2 years ago

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100 POINTS + BRAINLYEST FOR FIRST PERSON THAT GETS IT RIGHT!!!! While writing a formula, what are some ways to insert a cell ref

nexus9112 [7]

Answer:

Line second and third i.e, "typing the cell name, like "B4" and clicking the cell to reference " the correct answer.

Explanation:

It relates to some kind of set of cells on the worksheet, which could be used to calculates the formula. It also helps to locate the information, which you want to analyze in the calculation. It can also provide the cell reference in more than one formula in the same worksheet, that relates to Information on many other workbooks, and wrong choices can be described as follows:

Hovering provides the basic details, in which we hover, that's why it is wrong .
Zooming is used in projection, it can't be used in the cell reference, that's why it is wrong.

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3 years ago

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