What is the probability that no more than 1 is defective

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Reference no: EM131077633

QUALITY CONTROL In a group of 20 ballpoint pens on a shelf in the stationery department of Metro Department Store, 2 are known to be defective. If a customer selects 3 of these pens, what is the probability that

a. At least 1 is defective?

b. No more than 1 is defective?

Reference no: EM131077633

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