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
Lemur [1.5K]
3 years ago
12

Among 10 laptop computers, five are good and five have defects. Unaware of this, a customer buys 6 laptops. (a) What is the prob

ability of exactly 2 defective laptops among them? (b) Given that at least 2 purchased laptops are defective, what is the probability that exactly 2 are defective.
SAT
2 answers:
andrew-mc [135]3 years ago
5 0
Use combinations, The total outcomes for this is 10C6 = (10!/(6!(10-6)!)=210
The number of outcomes with support question "a" are 5C2*5C4= 10*5=50 (2 from 2 defective so there are 4 not defective)
The probability is 50/210= 0.238 = 23.8%
Part b: as they say "at least" that means greater than 2, so you need the probability for 1 defective + 2 defective, for 1 defective you solve 5C1*5C5/10C6= 0.024. Add the probabilities for 1 and 2 defective 0.238+0.024=0.262 = 26.2% probability at least 2 laptops defectives.


KIM [24]3 years ago
4 0
You would have to use combinations.
You might be interested in
Which statements are true for invasive species?
kirill [66]

The correct statements are:

- They often compete with the native species for resources.

- They have the ability to displace the native species.

The invasive species are a hot topic, and that is mainly due to their impact on the native species. Though not always the case, the invasive species mostly manage to out compete the native species for resources, reproduce quicker, take over their habitat, and contribute to their decline. This is not always the case, as some invasive species don't manage to adapt to the new environment, but that also depends on the native competition as well.

A perfect example is Australia, where multiple animals have been introduced, thus became invasive species, with the rabbits and the cats being the most harmful ones. The rabbits reproduce very quickly, are opportunistic in their diets, and easily out compete the native species for food, thus displacing them and moving them away from the prime food sources. The cats, on the other hand, are predators against whom the native species don't have defense mechanisms, thus the cats contribute to the extermination of the native fauna.

8 0
4 years ago
In your opinion, did the speaker actually hear a ghost? Why or why not?
alexandr1967 [171]

In my opinion, the speaker heard the ghost.

3 0
4 years ago
What is the meaning of the word incongruous?
Arte-miy333 [17]

Answer:

Something that's incongruous is inconsistent or incompatible with something else

Explanation:

4 0
3 years ago
Read 2 more answers
Explain why goals should follow the AEIOU theory?
Nana76 [90]

Answer:

according to LREHBrainly Expert

First of all I would like to comment about Goal  Theory which is the label used in educational psychology to discuss research into motivation to learn.

By the other hand the AEIOU theory for many teachers is concerned as a model that stresses effective communication as a way of  dealing with conflict s.

Goals must follow some guidelines if they are able to be realistically reached. A: Achievable. E: Established, I: Important to you. O: Outlined.   U: Under control.

Explanation:

7 0
4 years ago
One hundred twenty five thousandths in decimal form
svet-max [94.6K]

Answer:

0.125

Explanation:

So I take "one hundred and twenty-five" to be one total number: 125

(my alternative understanding is that 100 is a whole integer and only 25 thousand, but I don't think that's what the question meant)

thousands: this means that the number will have a form of

x.xxx

(because the smallest number of this form, 0.001, is one-thousandth.

so we fill it in:

0.125

4 0
3 years ago
Other questions:
  • 1. A step occasionally required to repair damaged relationships is
    14·2 answers
  • A deka meter is best suited for measuring which distance
    15·2 answers
  • We edsafljds; fdhsj f;dkjsnfl ads;mfnds;aklfd;v afndnafj mlsd;fmnds;oajfd ldsmlkmfsla fs
    5·2 answers
  • What is TRUE about moral development? A. Most people fully master this type of development during their teenage years. B. The ma
    9·2 answers
  • I need the answer ASAP
    13·1 answer
  • A team of conservation scientists worked on the project shown in the image. Why is this project necessary at this location?
    14·1 answer
  • When diana got off the train there was a woman waiting for her.
    11·1 answer
  • Satya, nina, and iana each have a 3/4 chance of going to café georgia for an afternoon coffee at 1:00pm. Bohan will only go to c
    7·1 answer
  • Birds snakes, lizards, turtles and crocodiles are all thought to share a common ancestor.
    5·1 answer
  • Would the deer on the island be better off worse off or about the same without the wolves
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!