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Math Help - diskette probability

  1. #1
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    diskette probability

    A computer accessories distributor obtains its supply if diskettes from manufacturers A abd B with 60 % of the diskettes from manufacturer A . The diskettes are packed by the manufacturers in packets of tens . The probability that a diskette produced by manufacturer A is defective is 0.05 whereas the probability that a diskette produced by manufacturer B is defective is 0.02 . Find the probability that a randomly chosen packet contains exactly one defective diskette .
    Last edited by thereddevils; January 13th 2010 at 04:36 AM.
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    Quote Originally Posted by thereddevils View Post
    A computer accessories distributor obtains its supply if diskettes from manufacturers A abd B with 60 % of the diskettes from manufacturer A . The diskettes are packed by the manufacturers in packets of tens . The probability that a diskette produced by manufacturer A is defective is 0.05 whereas the probability that a diskette produced by manufacturer B is defective is 0.02 . Find the probability that a randomly chosen packet contains exactly one defective diskette .
    X_A ~ Binomial(n = 10, p = 0.05).

    X_B ~ Binomial(n = 10, p = 0.02).

    Calculate 0.6 \Pr(X_A = 1) + 0.4 \Pr(X_B = 1).
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