Computer keyboard failures can be attributed to electrical defects or mechanical defects. A repair facility currently has 25 failed keyboards, 12 of which have electrical defects and 13 of which have mechanical defects. (a) How many ways are there to randomly select 6 of these keyboards for a thorough inspection (without regard to order)

Answer:

There are 177,100 ways.

Step-by-step explanation:

Since there is no regard to order, we use the combinations formula to solve this question.

Combinations formula:

[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

In this question:

6 keyboards from a set of 25. So

[tex]C_{25,6} = \frac{25!}{6!(25-6)!} = 177100[/tex]

There are 177,100 ways.

In a certain chemical, the ratio of zinc to copper is 4 to 11. A jar of the chemical contains 418 grams of
copper. How many grams of zinc does it contain?
It contains
grams of zinc.

hurry I am timed Which part of the cell holds genetic information in the molecule DNA?

ribosome


chromosomes


Golgi body


vacuole

value of b in the quadratic equation 3x/4=1/x

Working alone, it takes Stephanie seven hours to clean an attic. Shayna can clean it in 12 hours. How long would it take them to clean the attic working together?

plz help me i will give 14 points!!!

Will give you brainliest PLS HELP ASAPPP

How many degrees is angle x?

pls help this is due today whoever anders the most questions gets brainliest ​

The question is in the jpg.

Pls help me this is 7th grade (ADVANCED)

Figue out the measures

Find x. (More info in the picture)

Evaluate the expression when x=4, y=-6, and z= -3.

3x – 2y
----------------
Z​

What is an equation of the line that passes through the points (4, -8) and (-4, 2)?
Put your answer in fully reduced form.

Help ASAP! I’m confused. Thanks!!

Donnie has $20 to spend at the amusement park. The
amusement park charges a $10 admission fee. The
amusement park also has special exhibits that cost $4.00
each to view. Which equation can be used to determine the
amount of money, y, that Donnie has left if he views x
exhibits?

After a discount of 30%, the sale price of a ride
pass at a fun park is $35. What was the original
price?

What place is the digit 3 in the number 6,257.839

The tables show the amount earned by James and Paco working at the same store.

James's Hours Amount Earned
3 $35.40
5 $59.00
8 $94.40

Paco's Hours Amount Earned
2 $24.00
4 $48.00
7 $84.00
What are the two equations that can represent James and Paco's hourly wages, where h is the number of hours worked and d is the amount of money earned?

Compare the equations to determine if there is any difference between what James and Paco make each hour.

Jack Lawler, a financial analyst, wants to prepare an article on the Shadow Stock portfolio developed by the American Association of Individual Investors (AAII). A list of the 30 companies in the Shadow Stock portfolio as of March is contained in the Excel Online file below. Use the spreadsheet to answer the following questions.

Jack would like to select a simple random sample of 5 of these companies for an interview concerning management practices.

a. The Shadow Stock companies are listed in column A of the Excel worksheet provided above. In column B we have generated a random number for each of the companies. Use these random numbers to select a simple random sample of 5 of these companies for Jack by finding the smallest random number, the second smallest random number, etc. in column B using an Excel function.

The random numbers corresponding to the first 5 companies selected are (to 5 decimal places):

First company (smallest random number) ____

Second company (2nd smallest random number) ____

Third company (3rd smallest random number) _____

Fourth company (4th smallest random number) _____

Fifth company (5th smallest random number)______

0.15106
0.78664
0.46736
0.31288
0.05743
0.96845
0.70824
0.43701
0.68709
0.49262
0.69531
0.04123
0.51061
0.23796
0.92181
0.91875
0.97469
0.78824
0.30299
0.61512
0.83291
0.05894
0.76809
0.85076
0.61597
0.42998
0.92434
0.36411
0.72285
0.29854

15. A private swimming club
ges $2.50
After the first hour, swimmers have to pay an additional $1.50 for each h.
hour, or part of a half hour thereafter. Georgina and her friend swam int
pool for x hours.

6. Los divisores de 28 son:
a. D28 = { 1, 2, 3, 7, 9, 28}
b. D28 = {1,2,5, 8, 14,28}
c. D28 = {1, 2, 4, 7, 14, 28}​

If you overestimate the standard deviation of the population, which type of error are you potentially increasing

. Of the 200 students surveyed in 5th grade, 120 prefer bananas and 80 prefer apples. what is the part to whole ratio?​

a car is traveling at a speed of 83 mph. what is the cars speed in miles per minute? how many miles will the car travel in 2 minutes?

People drive, on average, 14,063 miles per year. About how many miles each week is that?

What is the smallest possible value x could take given that it must be an integer?
x>−3

Draw a model to show 100 ounces of soda divided equally among 12 people. How many

ounces will each person have?

Sixty percent of a plane's passengers are women and ten percent of those women are in first class. What is the number of women in first class if the plane is carrying 200 passengers?

A study suggested that childrenbetween the ages of 6 and 11 in the US have anaverage weightof 74 lbs. with a standard deviation of 2.7 lbs.If we assumethe weights are normally distributed, what proportion of childrenin this age range between 70 lbs. and 85 lbs.