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OpenStudy (swissgirl):
Suppose that 2 defective refrigerators have been included in a shipment of 6 refrigerators. The buyer begins to test the refrigerators one at a time. What is the probability that no more than 4 refrigerators need to be tested to locate both of the defective refrigerators?
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OpenStudy (swissgirl):
@satellite73 Can you help me?
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