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4-87.

​Refrigerators that are produced on an assembly line sometimes contain defects. The probability that a refrigerator has a paint blemish is . The probability that it has a dent is . The probability that it has both a paint blemish and a dent is also . What is the probability that a refrigerator has a paint blemish or a dent? What can you conclude about defects on these refrigerators? Homework Help ✎



Conclusion: If a refrigerator has a dent, it also always has a paint blemish.