SOLUTION: A factory worker places 86 newly created circuits on a shelf to be checked for quality. of these 6 will not work correctly. Suppose that she is asked to randomly select 2 circuits,

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Question 235378: A factory worker places 86 newly created circuits on a shelf to be checked for quality. of these 6 will not work correctly. Suppose that she is asked to randomly select 2 circuits, without replacement. what is the chance that both circuits she selects will be defective? approximate to the nearest ten thousandth.
Answer by stanbon(26259) About Me  (Show Source):
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A factory worker places 86 newly created circuits on a shelf to be checked for quality. of these 6 will not work correctly. Suppose that she is asked to randomly select 2 circuits, without replacement. what is the chance that both circuits she selects will be defective? approximate to the nearest ten thousandth.
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# of ways to pick 2 defective: 6C2
# of ways to pick 2 or the 86: 86C2
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Ans: 6C2/86C2 = 15/3655 = 0.0041
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Cheers,
Stan H.