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
inn [45]
3 years ago
13

A computer store has 75 printers of which 35 are laser printers and 40 are ink jet printers. if a group of 10 printers is chosen

at random from the store, find the mean and variance of the number of ink jet printers.
Mathematics
1 answer:
JulijaS [17]3 years ago
6 0
Your mean for this problem would be 4.7 and you variance would be 2.5
You might be interested in
Evaluate −m2n+m2 when m=−4.
fgiga [73]

Answer:

Does this answer your question − 16 n  +  16

4 0
3 years ago
Please help. I don't understand how to do this. I need this asap. please
Schach [20]

9514 1404 393

Answer:

  r = 1/9

Step-by-step explanation:

First of all, solve the equation for r:

  y = rx

  y/x = r . . . . . . . divide by x

__

Since r is a constant, it will be the same for any corresponding pairs of x and y. It is convenient to choose both x and y as integers, as in the third table entry.

  r = y/x = 5/45

  r = 1/9 . . . . . . . . . reduced fraction

_____

<em>Additional comment</em>

It is not a bad idea to check to see that this works with other values of x and y. For the first line of the table, we have x = 11:

  y = rx = (1/9)(11) = 11/9 = 1 2/9 . . . . matches the table value

6 0
3 years ago
Which of the following is best described as a three-dimensional solid consisting of a base that can be any polygon a point not i
Harman [31]

Answer:

Option D

Pyramid

Step-by-step explanation:

The clause that gave away the answer is "<em>three-dimensional solid consisting of a base that can be any polygon"</em>

<em></em>

Scanning through the options, we can see that the only option that fits the description is the pyramid.

The pyramid is the only three-dimensional shape amongst the options that can take any polygon as a base.

<em>The other options get screened out here.</em>

A cube must have a square base.

A triangular prism must have a triangular base

A rectangular prism must have a rectangular base

Thus, option D: The Pyramid is the correct answer.

3 0
4 years ago
In the figure M ab =45 and M cd= 23 what is the value of x?
const2013 [10]

Answer:

34°

Step-by-step explanation:

The measure of vertical angles formed by two chords is equal to one half the sum the measures of the arcs.

In other words, x is the average:

x = (23° + 45°) / 2

x = 34°

5 0
3 years ago
Someone help pls and thanks
Amiraneli [1.4K]
C I am soooo sorry if I’m wrong
4 0
3 years ago
Other questions:
  • 0.005123 in scientific notation
    8·1 answer
  • Shona drove 264 miles in 5.5 hours at this rate how far can she drive in 7 hours
    14·1 answer
  • What is the remainder when x 3 − 7x + 5 is divided by x + 3 ?
    8·1 answer
  • 2. Three numbers whose product is 64 are 2, 4,
    12·2 answers
  • What is 8 divided by 8 x 6 plus 8 minece 5 =
    13·1 answer
  • Help i don't understand this.
    8·1 answer
  • 1) Slope =-1, y-intercept = 0
    5·1 answer
  • The below image shows the intersection of two lines. What is themeasurement of angle b?
    12·1 answer
  • Lara bought 3 yards of fabric and a spool of thread for $28.10. If the spool of thread cost $1.25, how much did the fabric cost
    12·1 answer
  • The school board of a large school district would like to raise taxes in the district to pay for new computers. To see if there
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!