SOLUTION: an experiment consists of picking 3 iPods at random from a box of 120 ipods, of which 5 are defectived. fine the probability that all 3 ipos picked are defectived (chosen without a

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Question 446257: an experiment consists of picking 3 iPods at random from a box of 120 ipods, of which 5 are defectived. fine the probability that all 3 ipos picked are defectived (chosen without a replacement).
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
An experiment consists of picking 3 iPods at random from a box of 120 ipods, of which 5 are defective. Find the probability that all 3 ipods picked are defective. (chosen without a replacement).
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P(pick 3 defective without replacement)
= (5/120)*(4/119)*(3/118)
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= 0.00003561
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Another way to work it:
P(3 defective) = 5C3/120C3 = 10/280840 = 0.00003561
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Cheers,
Stan H.
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