<PRE><B>Question 469323</B>
USA Today reports that about 25% of all prison parolees become repeat offenders. Alice is a social worker whose job is to counsel people on parole. Let us say success means a person does not become a repeat offender. Alice has been given a group of four parolees. 
(a) Find the probability P(r) of r successes ranging from 0 to 4. (Round your answers to three decimal places.)
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Note: This is a binomial problem with n = 4 and p = 0.25
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For each of the following P(r) = (4Cr)(0.25)^r*(0.75)^(4-r)
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Example: 
P(0) = (4C0)(0.25)^0*(0.75)^4 = 1*1*0.3164 = 0.3164
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etc.
  
P(1) = 
P(2) = 
P(3) = 
P(4) = 
(b) Make a histogram for the probability distribution of part (a).
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Cheers,
Stan H.
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