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Probability and Statistics

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A package contains 12 resistors, 3 of which are defective. If four are selected, find the
probability of getting the following.
No defective resistors
One defective resistors
3 defective resistors

  • Probability and Statistics -

    Assuming no replacement,

    The probability of both/all events occurring is determined by multiplying the probabilities of the individual events.

    None defective = 9/12 * 8/11 * 7/10 * 6/9 = ?

    One defective = 3/12 * 9/11 * 8/10 * 7/9 = ?

    Three defective = 3/12 * 2/11 * 1/10 * 9/9 = ?

  • Probability and Statistics -

    a record company claims that of 55 000 cd's produced 15% will be defective, 100 were defective. is the company right?

  • Probability and Statistics -

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