Koriunaa
21.04.2020 •
Mathematics
Combine like terms to create an equivalent expression: -2/3p + 1/5 - 1 + 5/6p
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Ответ:
-2/3 is equivalent to -4/6
-4/6 + 5/6 is basically 5/6 - 4/6 so it is 1/6
1 is equivalent to 5/5
1/5 - 5/5 is -5/5 + 1/5 which is - 4/5
Combine both and you get :
1/6 p - 4/5
Ответ:
0.9744 probability that AT LEAST ONE of them has been vaccinated
Step-by-step explanation:
For each person, there are only two possible outcomes. Either they have been vaccinated, or they have not. The probability of a person having been vaccinated is independent of any other person. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which
is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
60% of the people have been vaccinated.
This means that
If 4 people are randomly selected, what is the probability that AT LEAST ONE of them has been vaccinated?
This is
We have that
In which
0.9744 probability that AT LEAST ONE of them has been vaccinated