Question 272486
Paul takes a 20 question true false test and randomly guesses at each answer what is the probability of his passing the quiz if it takes at least 12 correct answers
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Binomial: n = 20 ; p = 0.5 
P(12 <= x <= 20) = 1-binomcdf(20,0.5,11) = 0.2517
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Cheers,
Stan H.