trujillo03
21.10.2020 •
Mathematics
In 2016, Southwest Airlines boasted that 70% of its flights were on time. If we select 8 Southwest flights at random and assume independence, what is the probability that at least 3 flights are on time
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Ответ:
0.9887
Step-by-step explanation:
Let p be the probability that flights are on time.
As per given, p =70% = 0.7
Sample size : n = 8
Let x be a binomial variable that represents the number of fights are on time ( i.e. success).
Using binomial formula:
Now, the probability that at least 3 flights are on time =
The probability that at least 3 flights are on time = 0.9887
Ответ:
Not for just 5 points...