Components of a certain type are shipped to a supplier in batches of twenty. Three components are randomly selected from

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answerhappygod
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Components of a certain type are shipped to a supplier in batches of twenty. Three components are randomly selected from

Post by answerhappygod »

Components of a certain type are shipped to a supplier in
batches of twenty. Three components are randomly selected from a
batch and tested. If one such batch contains three defective
components,
i. What is the probability that all of the selected components
are defective? [Ans: 0.0009]
ii. What is the probability that at least two of the selected
components are defective? [Ans: 0.0456]
(The answers are at the side but I can't figure them out,
would you be able to show a step by step process of how to get
these answers please)
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