In a certain desert region the number of persons who become, Ask an Expert

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In a certain desert region the number of persons who become seriously ill each year from eating a certain poisonous plant is a random variable having a Poisson distribution with λ = 5.2. Use Table II of "Statistical Tables" to find the probabilities of

(a) 3 such illnesses in a given year;

(b) at least 10 such illnesses in a given year;

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