A manufacturing company uses an acceptance scheme on production items before they are shipped. The plan is a two-stage one. Boxes of 25 are readied for shipment and a sample of 3 is tested for defectives. If any defectives are found, the entire box is sent back for 100% screening. If no defectives are found, the box is shipped.,(a) What is the probability that a box containing 3 defectives will be shipped?,(b) What is the probability that a box containing only 1 defective will be sent back for screening?

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