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In a textile factory, the number of manufacturing defects of a type of fabric is distributed according to a Poisson law whose average is 0.3

In a textile factory, the number of manufacturing defects of a type of fabric is distributed according to a Poisson law whose average is 0.3 defects per square meter. 1. What is the probability that there are exactly four manufacturing defects in 20 m2 of this fabric? 2. What is the probability that there are more than three manufacturing defects in 15 m2 of this fabric?

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