The number of times that a person contracts a cold in a given year is a Poisson random variable with parameter λ=5. Suppose that a new wonder drug (based on large quantities of vitamin C) has just been marketed that reduces the Poisson parameter to λ=3 for 70 percent of the population. For the other 30 percent of the population, the drug has no appreciable effect on colds. If Peter tried the drug for a year and has 3 colds in that time, what is the probability that the drug is beneficial for him?

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A:

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Q: A bag has 20 red balls, 30 blue balls, and 50 green balls. A ball is drawn and put back into the…

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Q: 4. P4 = P(A | Bº). (P1, P2, P3, P4) =(

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