Question 867340
Recently, southwest Air had the best rate with 80% of its flights arriving on time. A test is conducted by randomly selecting 10 southwest flights and observing whether they arrive on time. Find the probability that at most 3 flight arrive late. 
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Binomial Problem with n = 10 and p(on time) = 0.8
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P(0<= x <=3) = binomcdf(10,0.8,3) = 0.0008644..
Cheers,
Stan H.
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