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12.A big airplane carries 400 passengers. Assume that the passenger weight (including clothing and luggage) has mean 250 pounds and standard deviation 100 pounds. What

12.A big airplane carries 400 passengers. Assume that the passenger weight (including clothing and luggage) has mean 250 pounds and standard deviation 100 pounds. What capacity (in pounds) should the plane require to be 95% sure that the total weight of the passengers does not exceed the capacity?

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