Probability that at least one defective card is in sample

Reference no: EM13131527

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 one defective card appears in the sample?

Reference no: EM13131527

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