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  • Mar 1, 2010, 12:57 PM
    hwrdcarolyn
    A certain airplane has two independent alternators to provide electrical power. The p
    A certain airplane has two independent alternators to provide electrical power. The probability
    that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will
    fail? (b) Neither will fail? (c) One or the other will fail? Show all steps carefully.
  • Mar 2, 2010, 09:13 AM
    Unknown008

    This question actually falls in the category of Mathematics.

    P(both will fail) = P(one fails) x P(other fails)

    P(neither fails) = P(one not fail) x P(other not fail) = [1 - P(one fails)] x [1 - P(other fails)]

    P(one or the other fails) = P(first fails, but not second) + P(first does not fail, but second does) = (P(first fails) x P(second not fail)) + (P(first not fail) x P(second fails))

    Can you do it now?

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