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Raw materials are studied for contamination. Suppose that the number of particles of contamination per pound of material is a Poisson random variable with a mean of 8 particle per pound. A) What is the expected number of pounds of material required to obtain 5 particles of contamination? B) What is the standard deviation of the pounds of materials required to obtain 5 particles of contamination?
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In this problem we are dealing with an Er lang distribution. Er lang distribution is related to the Poisson distribution

e Poumss obtoin s Poon ic les o Comtamina tion mark , a B) stando d deviation the poonys Ocin 2 o 95 pounds

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