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knight5910
20.10.2020 •
Mathematics
96% of all air travel departs on time. If you are taking 3 flights in one day, what is the probability that all of them depart on time?
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Ответ:
0.884736
Step-by-step explanation:
Given: The proportion of all air travel departs on time: p= 0.96
Total flights : n= 3
Let x be the number of flights on time.
As there are two cases either flight on time or not, so it is a binomial case.
Binomial distribution formula:![P(X=x)=\ ^nC_xp^x(1-p)^{n-x}](/tpl/images/0821/5395/02fab.png)
The probability that all of them depart on time =![P(X=3)=\ ^3C_3(0.96)^3(1-0.96)^0=(1)(0.96)^3=0.884736](/tpl/images/0821/5395/c10ea.png)
The probability that all of them depart on time = 0.884736
Ответ: