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4 June, 11:49

A certain airplane has two independent alternators to provide electrical power. the probability that a given alternator will fail on a one-hour flight is 0.045. (a) what is the probability that both will fail? (round your answer to 4 decimal places.) probability. 0020 (b) what is the probability that neither will fail? (round your answer to 4 decimal places.) probability. 998 (c) what is the probability that at least one fails?

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Answers (2)
  1. 4 June, 12:34
    0
    I think the answer is

    0.087975

    or

    .087975
  2. 4 June, 13:36
    0
    P (fail) = p=0.045

    Given the two alternators are independent.

    (A) P (Both fail) = 0.045^2 = 0.002025

    (B) P (None fails) = (1-0.045) ^2=0.912025

    (C) P (at least one fails)

    =1-P (non fails)

    =1-0.912025

    =0.087975
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