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probability of defective circuit card in the sample

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Printed circuit cards are placed in a functional test after being populated with semiconductor chips. A lot contains 140 cards, and 20 are selected without replacement for functional testing.

a.) If 20 cards are defective, what is the probability that at least 1 defective card is in the sample?
b.) If 5 cards are defective, what is the probability that at least 1 defective card appears in the sample?

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The solution shows how to calculate the probability of defective circuit card in the sample.

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Printed circuit cards are placed in a functional test after being populated with semiconductor chips. A lot contains 140 cards, and 20 are selected without ...

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