Probability???

The probability of a CD case being defective is 1/520. If the factory makes 7,800 cases per week, how many are likely to be defective?

I don't understand this its so confusing :(

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  1. Is it 7,800 divided by 520?

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  2. yes, but I would rather have you think of

    (1/520)(7800)
    = 7800/520 ---> see, there is your division by 520
    = 15

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    posted by Reiny
  3. THANKYOUTHANKYOUTHANKYOU
    <3<3 Reiny
    I was on this question for so long!

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