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In a shipment of 20 computers, 3 are defective. Tree computers are randomly selected and tested. What is the probability that all three are defective if the first and second one…

In a shipment of 20 computers, 3 are defective. Tree computers are randomly selected and tested. What is the probability that all three are defective if the first and second one…
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In a shipment of 20 computers, 3 are defective. Tree computers are randomly selected and tested. What is the probability that all three are defective if the first and second ones are replaced after being tested ? ( 20 POINTS )

User Niru
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The chances of finding all three defective are 1 / 180
User Liam Hanninen
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