I'm having an difficult time, determining how to to start in setting up the problem.
Use the binomial probability to show x successess given to the probability of p of success in an single trial.
n = 5, x = 2 , p = 0.25
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Binomial law is used when you repeat n independent experiences whose result can only be "success" with a probability p or "failure" with a probability (1-p)
The probability to get k success in n trials is given by the formula
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