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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 with an average of

In a textile factory, the number of manufacturing defects of a type of fabric is distributed according to a Poisson law with an average of 0.3 defects per meter square. 1. What is the probability that there are exactly four manufacturing defects? tion 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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