In (100 mathrm{~kg}) of a low-grade molten steel tapping there are on average (120 mathrm{impu}-) rities. Castings

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In \(100 \mathrm{~kg}\) of a low-grade molten steel tapping there are on average \(120 \mathrm{impu}-\) rities. Castings weighing \(1 \mathrm{~kg}\) are manufactured from this raw material. What is the probability that there are at least 2 impurities in a casting if the spacial distribution of the impurities in the raw material is assumed to be Poisson?

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