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
e-lub [12.9K]
3 years ago
11

A store has 80 modems in its inventory, 30 coming from Source A and the remainder from Source B. Of the modems from Source A, 20

% are defective. Of the modems from Source B, 8% are defective. Calculate the probability that exactly two out of a sample of five modems selected without replacement from the store’s inventory are defective.
Mathematics
1 answer:
RUDIKE [14]3 years ago
7 0

Answer:

0.102

Step-by-step explanation:

The number of defective modems in the inventory is 20% * 30 + 8% * 0.50 =10 (out of 80)

Note that the number of defectives in the inventory is fixed i.e. we are told that there is 1/8 probability that a modem in the inventory is defective, but rather that exactly 1/8 of all modems are defective.

The probability that exactly two modems in a random sample of five are defective is :

(10↓2)(70↓3) / (80↓5) = 0.102

You might be interested in
Pieter wrote and solved an equation that models the number of hours it takes to dig a well to a level of 72 feet below sea level
jek_recluse [69]

Answer:

Step-by-step explanation:

Is this the entire question? Some of it makes no sense without a diagram or something.

To get rid of A you actually have to solve the equation.

7h – 5(3h – 8) = –72        Remove the brackets

7h - 15h + 40 = - 72          Combine the like terms

- 8h + 40 = - 72                Subtract 40 from both sides

- 8h = -112                        Divide by -8

    h = 14

Well the depth is a whole number so A is true.

We don't know anything about time. But the answer is positive.

C is false because B is true.

We don't know exactly what the depth of the well is.

I would pick A, but you need the entire question.

8 0
2 years ago
C= 5/9(F-32)
SIZIF [17.4K]
It’s C I think but correct me if I’m wrong
8 0
2 years ago
Polygon ABCD will be dilated by a scale factor of 2.2 with the origin as the center of dilation, resulting in the image A'B'C'D'
ikadub [295]
The answer is A. <span>m = undefined, C'D' = 13.2 units. When you dilate both C and D with the scale factor 2.2 with the origin as the center of dilation, their coordinates respectively become the following:
C' (22, 13.2) and D (22,26.4)

The difference between 26.4 and 13.2 is 13.2. The slope is undefined since it is s vertical line.

</span>
4 0
2 years ago
Read 2 more answers
somebody read 50 pages of a book in 50 minutes she reads at a constant rate how many pages did she read per minute
miv72 [106K]
If she reads 50 pages of a book in 50 minutes, just divide 50 by 50.

50 / 50 = 1    She reads one page of a book a minute.
4 0
3 years ago
Ed intends to roll a six-sided number cube 100 times. What probability model can he use to predict whether or not each roll will
Stells [14]
The answer is Each roll has a 0.333 probability of being composite.

<em>(I just took the test, B was the answer)</em>

8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the sum of sqrt-2 and sqrt -18?
    7·2 answers
  • The gross income of Maurice Vaughn is $785 per week. His deductions are $42.25, FICA tax; $90.33, income tax; 2% state tax; 1% c
    8·2 answers
  • Kat is painting the edge of a triangular stage prop with reflective orange paint. The lengths of the edges of the triangle are (
    12·2 answers
  • 7x+8y= 8<br><br> Slope <br><br> Y intercept
    12·2 answers
  • Please help me ill give 20 points and mark brainliest
    8·1 answer
  • If steak costs $12.55 per pound, what will be the total cost of 0.6 pounds of steak?\
    13·2 answers
  • Find the value of a and b from the figure​
    10·1 answer
  • Please help me last day to do this
    5·1 answer
  • Example of equal matrix​
    6·1 answer
  • Does anybody have the answer to this because I’m trying to make sure of my answer
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!