SOLUTION: a survey of US adults who attend at least one music concert a year found that 67% say concert tickets are too expensive. You randomly select 20 adults who attend at least one music

Question 732412: a survey of US adults who attend at least one music concert a year found that 67% say concert tickets are too expensive. You randomly select 20 adults who attend at least one music concert a year and ask them if concert tickets are too expensive. Find the probability that fewer than 4 people say that concert tickets are too expensive.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
a survey of US adults who attend at least one music concert a year found that 67% say concert tickets are too expensive. You randomly select 20 adults who attend at least one music concert a year and ask them if concert tickets are too expensive. Find the probability that fewer than 4 people say that concert tickets are too expensive.
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Binomial Problem with n = 20 and p(too expensive) = 0.67
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P(0<= x <=3) = binomcdf(20,0.67,3) = 0.000002432
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Cheers,
Stan H.
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