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9 April, 17:55

A battery manufacturer makes batteries that have a failure rate of. 015. That is, 15 out of each 1,000 batteries are defective. What is the probability that 175 out of the 10000 will be defective

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  1. 9 April, 18:18
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    P (failure) = 0.015

    p (success) = 1 - 0.015 = 0.985

    let x be the random variable that a battery is deffective, then

    p (x = 175) = 10000C175 * (0.015) ^175 * (0.985) ^ (10000 - 175)

    = 0.00408
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