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Asked by kumarshee | 2nd Feb, 2012, 05:17: PM

Expert Answer:

Probability of choosing defective pen = 4/10 , Probability of choosing normal pen = 6/10
Now , probability that out of 5 pen 2 are dfective is = 5C2 * (4/10)2 * (6/10)= 216/625

Answered by  | 3rd Feb, 2012, 01:33: PM

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