7. A lot consists of 20 defective and
30 non-defective items from which two items are chosen
w...
Mathematics, 18.04.2021 14:00 bknycfl3951
7. A lot consists of 20 defective and
30 non-defective items from which two items are chosen
without replacement. Events A & B are defined as A = the first item chosen is defective). B
= the scoond item chosen is defective,
a) What is the probability that both items are defective?
b) What is the probability that the second item is defective?
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Answers: 2
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