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3 years ago

Can anyone help? Please.

Computers and Technology

2 answers:

zloy xaker [14]3 years ago

7 0

The first riddle would be a baby crawling on all fours, then walking on two legs as an adult, and then walking with two legs and a cane as an elder.

The second riddle would be the letter "E"
End, timE, spacE, Every placE.

I hope this helps :)

Shtirlitz [24]3 years ago

3 0

I can’t see it... can you type it out please?

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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 technical support department at your company has informed you that you will be receiving a new computer within the next we

alexdok [17]

1) back up your data
2) delete any personal information
3) clear cookies, browsing data, and saved passwords
4) restore any settings you may have changed to original settings

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3 years ago

The parts of a memo are _____.

Alex

The correct answer would be D

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Given below is information about a network. Choose one of the following three options: the network is definitely a tree; the n

MatroZZZ [7]

A Network is definitely a Tree when any of the below properties matched.

Explanation:

A Network is synonym for connected graph. Connected graph is a graph is a path which will connect from vertex to vertex.

A Tree is a network that has no circuit. network can be differed from tree by three key properties

1. Single path property - one path connecting two vertices

2. All bridges property - every edge of a network is a bridge

3. N-1 edges property - N vertices has N-1 edges

To determine this we use to N-1 edges property as given number of vertices and no bridges.

If a network has 15 vertices it must have 15-1= 14 edges to become a tree

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3 years ago

Find at least three software programs for each of the two technologies listed below.

lakkis [162]

Answer:

Android Studio, FileZila

Explanation:

Android studio provides you with all tools you need to build a mobile application l.

FileZila is an FTP controller, you cam DELETE , SEND, RECIEVE data from it.

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3 years ago

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