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29 April, 16:41

According to a survey, 15% of city workers take the bus to work. Donatella randomly surveys 10 workers. What is the probability that exactly 6 workers take the bus to work? Round the answer to the nearest thousandth.

A. 0.001

B. 0.002

C. 0.128

D. 0.900

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Answers (1)
  1. 29 April, 18:54
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    X: the number of workers taking the bus to work

    p: probability of success = (15/100) = 0.15

    q: probability of failure = 1 - p = 0.85

    P (X=6) = 10C6 (0.15) ^6 (0.85) ^4

    = 0.001

    Ans: A
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