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The hull of a plane is composed of multiple aluminum plates welded together. Two types of welding techniques are used, A and B. The number
The hull of a plane is composed of multiple aluminum plates welded together. Two types of welding techniques are used, A and B. The number of A and B welding defects per square meter in the hull are both distributed according to Poisson distributions with averages of = 3 and = 4, respectively. What is the probability that a 2 square meters section of the hull contains exactly 2 welding defects of any type?
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