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Question: An accountant screens large batches of bills


An accountant screens large batches of bills according to the following sampling inspection plan. She inspects 4 bills chosen at random from each batch and p asses the batch if, among the 4, none is irregular. Find the probability that a batch will be passed if, in fact:
(a) 5% of its bills are irregular.
(b) 20% of its bills are irregular.

2.99

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