The three-year recidivism rate of parolees in Florida is about 30%; that is, 30% of parolees end up back in prison within three years (http://www.floridaperforms.com). Assume that whether one parolee returns to prison is independent of whether any of the others returns.,a. Find the probability that exactly 6 out of 20 parolees will end up back in prison within three years,,b. Find the probability that 6 or fewer out of 20 parolees will end up back in prison within three years.
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