Question

46% of all violent felons in the prison system are repeat offenders. If 45 violent felons...

46% of all violent felons in the prison system are repeat offenders. If 45 violent felons are randomly selected, find the probability that  


a. Exactly 21 of them are repeat offenders.
b. At most 23 of them are repeat offenders.
c. At least 19 of them are repeat offenders.  
d. Between 18 and 25 (including 18 and 25) of them are repeat offenders.

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