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    kingkidwell's Avatar
    kingkidwell Posts: 2, Reputation: 1
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    #1

    May 18, 2008, 08:49 AM
    Probability
    Three switches in an electrical circuit are connected in parallel. The probability of each switch working is P(A) = 0.6, P(B) = 0.7, P(C) = 0.8. What is the probability that at least one switch is working?
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    May 18, 2008, 08:51 AM
    Find the probability that none are working and subtract from 1.

    Not working: P(A)= .4, P(B) = .3, P(C)= .2

    If you need more assistance let me know where you're having trouble.
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