Question

Suppose the probability that a randomly selected person has a certain type of gene is 0.10. A randomly selected group of people are tested for this gene. What is the probability that the third person carrying this gene will be found at the eighth selection?

Answer #1

the probability that a randomly selected individual in a certain
community has made an online purchase is 0.37. suppose that a
sample of 11 people from the community is selected, what is the
probability that at most 3 of them has made an online purchase?

Suppose there is a 18.3 % probability that a randomly selected
person aged 20 years or older is a jogger. In addition, there is a
22.3% probability that a randomly selected person aged 20 years or
older is male, given that he or she jogs.
What is the probability that a randomly selected person aged 20
years or older is male and jogs?
Would it be unusual to randomly select a person aged 20 years or
older who is male?

Suppose the probability that a person has type O- blood is 0.05.
Consider a group of 200 people.
a. What is the probability that exactly 3 people of the people
in the group have type O- blood? (3 points)
b. Show that this binomial distribution satisfies both
conditions needed to use the normal approxi- mation to the
binomial. (2 points)
c. Using the normal approximation to the binomial, find the
probability that at least 13 people in the group have...

Suppose there is a 26.5% probability that a randomly selected
person aged 35 years or older is a smoker. In addition, there is a
21.2% probability that a randomly selected person aged 35 years or
older is female, given that he or she smokes. What is the
probability that a randomly selected person aged 35 years or older
is female and smokes? (Round to three decimal places as
needed.).

The probability that a randomly selected individual in a certain
community has made an online purchase is 0.48 . Suppose that a
sample of 10 people from the community is selected, what is the
probability that at most 3 of them has made an online
purchase?
Write only a number as your answer. Round to 2 decimal places (for
example 0.24). Do not write as a percentage.

The probability that a randomly chosen person is Rh-positive is
85%.
What is the probability that a randomly chosen person is
Rh-negative?
What is the probability the next 5 people tested are
Ph-positive?
What is the probability that out of the 5 people who have tested
at least one is Rh-negative?
If two people get tested, what is the probability that one is
Rh-positive and the other is Rh-Negative?

In a region, there is a 0.9 probability chance that a randomly
selected person of the population has brown eyes. Assume 15 people
are randomly selected. Complete parts (a) through (d) below. a.
Find the probability that all of the selected people have brown
eyes.
The probability that all of the 15 selected people have brown
eyes is 0.205. (Round to three decimal places as needed.)
b. Find the probability that exactly 14 of the selected people
have brown eyes....

Suppose that 44,000 people in New Zealand (population 4,400,000)
carry a particular rare gene X that places them at a higher risk of
developing cancer. A medical test will correctly indicate the
presence of gene X with 0.9 probability when carried out on a
person who carries gene X. If the person does not carry gene X it
will incorrectly indicate the presence of gene X with probability
0.05.
(i) Draw a fully labelled tree diagram where the first branch...

In a? region, there is a 0.8 probability chance that a randomly
selected person of the population has brown eyes. Assume 12 people
are randomly selected. Complete parts? (a) through? (d) below.
a. Find the probability that all of the
selected people have brown eyes.
The probability that all of the 12 selected people have brown
eyes is.
?(Round to three decimal places as? needed.)
b. Find the probability that exactly 11 of the
selected people have brown eyes.
The...

The probability of a randomly selected adult in one country
being infected with a certain virus is 0.004. In tests for the?
virus, blood samples from 25 people are combined. What is the
probability that the combined sample tests positive for the? virus?
Is it unlikely for such a combined sample to test? positive? Note
that the combined sample tests positive if at least one person has
the virus.

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