Question

In a large population, 70 % of the people have been vaccinated. If 3 people are randomly selected, what is the probability that AT LEAST ONE of them has been vaccinated?

Answer #1

In a large population, 52 % of the people have been vaccinated.
If 3 people are randomly selected, what is the probability that AT
LEAST ONE of them has been vaccinated?

In a large population, 58 % of the people have been vaccinated.
If 4 people are randomly selected, what is the probability that AT
LEAST ONE of them has been vaccinated?

In a large population, 69 % of the people have been vaccinated.
If 5 people are randomly selected, what is the probability that AT
LEAST ONE of them has been vaccinated?
Give your answer as a decimal (to at least 3 places) or
fraction.

In a large population, 67 % of the people have been vaccinated.
If 4 people are randomly selected, what is the probability that AT
LEAST ONE of them has been vaccinated?
Give your answer as a decimal (to at least 3 places) or
fraction

In a large town, the size of the population is 1200. 744
of the citizens have a healthy diet. (You may assume that
all sampling is done WITH REPLACEMENT)
1. What is the proportion of the population that has a healthy
diet? (express the proportion as a decimal)
2. If one citizen is randomly selected from the
population, what is the probability that the citizen has a healthy
diet? (express the probability as a decimal)
3. If one citizen is...

A community wishes to investigate the proportion of their
population that has been vaccinated against measles. In particular,
they are interested in whether this proportion is less than 90%,
the minimum required to achieve herd immunity. They randomly select
300 individuals from the community and question them regarding
their vaccination status. Of these individuals, 259 had been
vaccinated. They choose a significance level of 5%
. a. What are the null and alternative hypotheses?
b. (1 mark) What is the...

In a certain large population of people, the proportion that are
Rh positive (their blood has the rhesus protein) is approximately
0.82. Suppose 14 people are randomly selected from this
population.
a) What is the probability that exactly 12 are Rh positive? Give
your response to at least 3 decimal places.
b) What is the probability that more than 12 are Rh positive?
Give your response to at least 3 decimal places.
c) What is the probability that no more...

In a large population it is determined that 10% of people will
catch a virus. If ten people are
randomly selected, find the probability that
a) all ten will catch the virus
b) all ten will not catch the virus.
c) at least one person will catch the virus.

About 18% of the population of a large country is nervous
around strangers.
If two people are randomly selected, what is the probability
both are nervous around strangers?
What is the probability at least one is
nervous around strangers?
What is the probability that both will be nervous
around strangers

According to government data, 70% of employed women have never
been married. Rounding to 4 decimal places, if 15 employed women
are randomly selected:
a. What is the probability that exactly 2 of them have never
been married?
b. That at most 2 of them have never been married?
c. That at least 13 of them have been married?

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