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9 October, 21:08

g 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 12 Southwest flights and observing whether they arrive on time. (a) Find the probability that exactly 2 flights arrive late.

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  1. 9 October, 23:00
    0
    28.347 %

    Step-by-step explanation:

    by using binomial expansion

    P = 12C2• (80%) ^10• (20%) ^2 = 23.347 %
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