SOLUTION: The rates of on-time flights for commercial jets are continuously tracked by the U.S. Department of Transportation. Recently, Southwest Air had the best reate with 80 % of its flig
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Question 345596: The rates of on-time flights for commercial jets are continuously tracked by the U.S. Department of Transportation. Recently, Southwest Air had the best reate with 80 % of its flights arriving on time. A test is conducted by randomly selecting Southwest flights and observing whether they arrive on time. (a) Find the probability that exactly flights arrive on time.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
The probability of 
successes in 
trials where 
is the probability of success
on any given trial is given by:
\ =\ \left(n\cr k\right\)p^k\left(1\,-\,p\right)^{n\,-\,k})
Where )
is the number of combinations of things taken at a
time and is calculated by !})
For your situation, 
, but you didn't specify how many flights were observed nor exactly how many should be on time, so I can't help you with and
John
My calculator said it, I believe it, that settles it
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