SOLUTION: When an aopinion poll calls residential telephone numbers at random only 20% of the calls reach a live person you watch the random digit dialing machine make 15 calls. What is

Question 418203: When an aopinion poll calls residential telephone numbers at random only 20% of the calls reach a live person you watch the random digit dialing machine make 15 calls.
What is the probability that at most 3 calls reach a person?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
When an aopinion poll calls residential telephone numbers at random only 20% of the calls reach a live person you watch the random digit dialing machine make 15 calls.
What is the probability that at most 3 calls reach a person?
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Binomial with n = 15 and p = 0.2
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P(0<= x <=3) = binomcdf(15,0.2,3)
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Cheers,
Stan H.
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