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victus00 [196]
3 years ago
14

Pleaseee helpp whoever answers best ill give them brainliest xx

Mathematics
2 answers:
Effectus [21]3 years ago
6 0

Answer:

my guess is 4?

im a little confused because there isnt a question

ioda3 years ago
3 0

Answer:

uh what's the question- there needs to be a question to be an answer >.< i'll edit this answer once you tell me the question

Step-by-step explanation:

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Blood type AB is the rarest blood type, occurring in only 4% of the population in the United States. In Australia, only 1.5% of
Naddik [55]

Answer:

There is a 27.62% probability that exactly 2 of the U.S. residents have blood type AB.

Step-by-step explanation:

For each U.S. resident, there are only two outcomes possible. Either they have blood type AB, or they do not. This means that we can solve this problem using binomial probability distribution concepts.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.\pi^{x}.(1-\pi)^{n-x}

In which C_{n,x} is the number of different combinatios of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And \pi is the probability of X happening.

In this problem, we have that:

50 U.S residents are sampled, so n = 50

4% of the U.S population has blood type AB, so p = 0.04.

What is the probability that exactly 2 of the U.S. residents have blood type AB?

This is P(X = 2). So:

P(X = x) = C_{n,x}.\pi^{x}.(1-\pi)^{n-x}

P(X = 2) = C_{50,2}.(0.04)^{2}.(0.96)^{48} = 0.2762

There is a 27.62% probability that exactly 2 of the U.S. residents have blood type AB.

5 0
3 years ago
What is happening to the graph when the x-values are between 4 and 8
VashaNatasha [74]
The numbers are going down
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3 years ago
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Roxanne has $20 and she wants to buy some shirts. She picks one shirt that costs $10.99 and two shirts that cost $4.99 each.
timurjin [86]

Answer:

A

Step-by-step explanation:

bc it's the most simple option for roxanne

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3 years ago
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A number less than two
murzikaleks [220]

Answer:

1

Step-by-step explanation:

:)..................

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3 years ago
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Find the value of x. Please help
vitfil [10]

Answer:

The answer is 57.

180 - 67 - 56 = 57

4 0
3 years ago
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