a factory manufacture pens in this factory allot is approved for sale if all the pens are good and no defective pens is included. But checking each and every pain is not possible for this a lot is approved on the basis of an experiment done experiment is a penis drawn at random and tested what is the probability that a lot containing 20 defective pens and 2000 good pens will be approved?
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may be200000 pens will be approved
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