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An automatic machine inserts mixed vegetables into a plastic bag. Past experience revealed that some packages were underweight and some were overweight, but most of them had satisfactory weight. Weight % of Total Underweight 2.5 Satisfactory 90.0 Overweight 7.5 Three packages are selected from the food processing line. What is the probability of selecting and finding that all three of them are underweight?
Correct Answer: A
P(all three underweight) = 0.025*0.025*0.025 = 0.0000156.