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Olegator [25]
3 years ago
14

To recover a deleted document, what would you choose in the Info window?

Computers and Technology
1 answer:
kiruha [24]3 years ago
6 0
Retrive you can restart your computer press f8 it will takr you to a menu were you can choos recover lost files then go from there
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Write a program that assigns values to
ss7ja [257]

Explanation:

10:A program that assigns the sum 20,30,40

20: input 20,30,40

30:sum input

40: print total

End

3 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

<em>Hence, there are 1365 ways </em>

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)

<em>From the given parameters; 3 out of 15 is detective;</em>

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;

<em>Probability that at least one is defective + Probability that at none is defective = 1</em>

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
Mr. Yang is a doctor who regards video games as an effective means of staying fit. What type of game would he recommend to his p
LUCKY_DIMON [66]

wii sports, just dance, etc.

Explanation:

3 0
3 years ago
Since the 1970s, local tv newscasts have developed a similar look. that's because
professor190 [17]
<span>(news doctors, consultants) said people should be young, attractive, smile and look happy.</span>
6 0
3 years ago
Read the excerpt from a teacher's lesson plan. Global communication, especially in today's digital age, can benefit all of you i
Rufina [12.5K]

The best line to be added to the teacher’s lesson plan, which is supposed to emphasize the benefits of global communication, would be (D) learning in a global community enables you to expand your horizons and learn new languages.

The other options are not suitable because they highlight the negative side of global communications, which is not something that the teacher’s lesson intends to do.

8 0
3 years ago
Read 2 more answers
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