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A widget inspector inspects 12 widgets and finds that

Question: A widget inspector inspects 12 widgets and finds that exactly 3 are defective. Unfortunately, the widgets then get all mixed up and the inspector has to find the 3 defective widgets again by testing widgets one by one.

(a) Find the probability that the inspector will now have to test at least 9 widgets.

(b) Find the probability that the inspector will now have to test at least 10 widgets.

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Basic Statistics: A widget inspector inspects 12 widgets and finds that

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Basic Statistics: A widget inspector inspects 12 widgets and finds that

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