1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
r-ruslan [8.4K]
3 years ago
11

A quality control specialist for a large computer store conducted a random sample of 150 laptops from its stock. She found 3 did

not turn on, and 5 required system updates to run properly. What is a reasonable probability model for the laptops the store has in stock?
Select all that apply:

2% of the laptops will require system updates.
3.3% of the laptops will require system updates.
92% of the laptops will function properly.
5.3% of the laptops will require system updates.
96.6% of the laptops will function properly.
94.7% of the laptops will function properly.
Mathematics
1 answer:
ANEK [815]3 years ago
8 0

Answer:

<u>3.3% of the laptops will require system updates.  This option applies because 3.3% of 150 is 5.</u>

<u>94.7% of the laptops will function properly. This option applies because 94.7% of 150 is 142.</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Random sample = 150 laptops

Number of laptops that didn't turn on = 3

Number of laptops that required system updates = 5

Therefore, number of laptops that will function properly = 142

2. What is a reasonable probability model for the laptops the store has in stock?

2% of the laptops will require system updates.  This doesn't apply because 2% of 150 is 3 and not 5.

<u>3.3% of the laptops will require system updates.  This option applies because 3.3% of 150 is 5.</u>

92% of the laptops will function properly. This doesn't apply because 92% of 150 is 138 and not 142.

5.3% of the laptops will require system updates.  We are not totally sure if the laptops that don't turn on, will also require system updates. Most likely, they will but we're not 100% sure. Therefore, this option doesn't apply.

96.6% of the laptops will function properly.  This doesn't apply because 96.6% of 150 is 145 and not 142.

<u>94.7% of the laptops will function properly. This option applies because 94.7% of 150 is 142.</u>

You might be interested in
If a dress costs $27,000 when it is on sale for 10% off, what is its original cost?
Ede4ka [16]

Answer:

30,000

Step-by-step explanation:

10% of 30,000 is 3,000

30,000 - 3,000 = 27,000

4 0
2 years ago
Solving for matrices
muminat

Answer:

D

Step-by-step explanation:

The augmented matrix for the system of three equaitons is

\left(\begin{array}{ccccc} 3&-4&-5&|&-27\\5&2&-2&|&11\\5&-4&4&|&-7\end{array}\right)

Multiply the first row by 5, the second row by -3 and add these two rows:

\left(\begin{array}{ccccc} 3&-4&-5&|&-27\\0&-26&-19&|&-168\\5&-4&4&|&-7\end{array}\right)

Subtract the third row from the second:

\left(\begin{array}{ccccc} 3&-4&-5&|&-27\\0&-26&-19&|&-168\\0&6&-6&|&18\end{array}\right)

Divide the third row by 6:

\left(\begin{array}{ccccc} 3&-4&-5&|&-27\\0&-26&-19&|&-168\\0&1&-1&|&3\end{array}\right)

Now multiply  the third equation by 26 and add it to the second row:

\left(\begin{array}{ccccc} 3&-4&-5&|&-27\\0&-26&-19&|&-168\\0&0&-45&|&-90\end{array}\right)

You get the system of three equations:

\left\{\begin{array}{r}3x-4y-5z=-27\\-26y-19z=-168\\-45z=-90\end{array}\right.

From the third equation

z=\dfrac{90}{45}=2.

Substitute z=2 into the second equation:

-26y-19\cdot 2=-168\\ \\-26y-38=-168\\ \\-26y=-168+38=-130\\ \\y=\dfrac{130}{26}=5.

Now substitute z=2 and y=5 into the first equation:

3x-4\cdot 5-5\cdot 2=-27\\ \\3x-20-10=-27\\ \\3x-30=-27\\ \\3x=-27+30=3\\ \\x=1.

The solution is (1,5,2)

4 0
3 years ago
A pipe that's 36 inches long needs to be cut into 2 and one forth inches long pieces. how may pieces can be cut from this length
PolarNik [594]
16 pieces may be cut. This is because we need to divide 36 by 2 and 1/4 to find how many pieces hat can be cut. First, we need to change everything into a fraction (or improper fraction). 2 and 1/4 = 9/4 (if you need help trying to find out how to get this, just ask). Then, since we are doing division, we flip the 9/4 around to get 4/9. 36 times (it's not dividing anymore since we flipped the 9/4) 4/9 = 16 pieces. I hope this helps! :D
7 0
3 years ago
Write an expression<br> for: "the quotient of<br> a number and 7<br> increased by 10"
yarga [219]

Answer:

(n / 7) + 10 = x

Step-by-step explanation:

7 0
2 years ago
Please answers all these questions for me need help too pass plz help☺
vodka [1.7K]

Please take 1 minute, and really read the example solution
under problem #12.  All of the other eight problems on the
sheet are solved in exactly the same way:

Multiply each side of the equation by the denominator of
the fraction ... the number under the variable (the letter).

This easy step will get you the answer to each of the
eight problems.

I can't help noticing that the title of the sheet is 'extra PRACTICE' .
If someone handed you the answers, then you would not get the
practice.  That would be just like stealing from you, and would be
just plain mean.

8 0
3 years ago
Other questions:
  • I'LL GIVE 33 POINTS!!!!
    11·2 answers
  • A rectangle has an area of 192 square inches. Find it’s length and width if the length is 3 times the width
    5·1 answer
  • Solve each inequality. Graph the solution
    15·1 answer
  • So, I have 13 beads that have a mass of 29/5 grams, what is the average?
    6·1 answer
  • Bob is taking his son to look at colleges. The first college they plan to visit is 150 miles from their home. In the first hour
    5·1 answer
  • Solve 2 + 3ex + 2 = 7 for x. Please be quick
    15·1 answer
  • A dilation with a scale factor of 2 is applied to the image below. What is the length of the new image?
    9·1 answer
  • What is the circumference of a child's swimming pool that has a radius of 3 feet
    7·1 answer
  • A fitness center will install a square hot tub in a 6 meter by 6 meter room. They want the tub to fill no more than 75% of the r
    7·1 answer
  • Urgent please help..
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!