SOLUTION: In a large population, 64 % 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 yo

Algebra ->  Probability-and-statistics -> SOLUTION: In a large population, 64 % 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 yo      Log On


   



Question 1174102: In a large population, 64 % 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.

Found 3 solutions by ewatrrr, ikleyn, MathTherapy:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

 Hi,

In a large population, 64% 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?

  
P( x≥ 1) = 1 - binomcdf(4, .64, 0)  = 1 - .0168 = .983 (decimal to 3 places)
            
Wish You the Best in your Studies.
 Solution works Great... with proper entering.



Answer by ikleyn(52780) About Me  (Show Source):
You can put this solution on YOUR website!
.
In a large population, 62% 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 4 places.
~~~~~~~~~~~~~


This probability is the COMPLEMENT to the probability of the event "No one of 4 has been vaccinated",


and THEREFORE is equal to  1 - %281-0.62%29%5E4 = 1+-+0.38%5E4 = 0.9791.

Solved.

------------

The solution and the answer by @ewatrrr are both incorrect.

.................

After seeing my post, @ewatrrr corrected her post --- now it is Ok.




Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!
In a large population, 64 % 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.
I agree with tutor @IKLEYN that the other person is WRONG. I also agree with tutor @IKLEYN's setup of the problem, with the exception that
the success rate s/b 64% (.64) as opposed to 62% (.62), thereby making the answer: 0.98320384 ≈ highlight_green%28matrix%281%2C3%2C+.9832%2C+or%2C+%2298.32%25%22%29%29